/* ================================
   CSS Variables & Reset
   ================================ */

/* SVG color filter for gold (#FBB03B) */
.svg-gold {
    filter: brightness(0) saturate(100%) invert(72%) sepia(98%) saturate(1200%) hue-rotate(354deg) brightness(101%) contrast(96%);
}

/* SVG color filter for phoenix-orange (#d89333) */
.svg-orange {
    filter: brightness(0) saturate(100%) invert(58%) sepia(89%) saturate(400%) hue-rotate(360deg) brightness(95%) contrast(90%);
}

:root {
    /* Light Theme Colors */
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fafafa;

    /* Phoenix Brand Colors */
    --phoenix-orange: #d89333;
    --phoenix-gold: #ffc641;
    --phoenix-yellow: #FFD700;

    /* Text Colors */
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #6a6a6a;
    --text-muted: #9a9a9a;

    /* Paper Color Palette (for cards) */
    --paper-white: #FFFFFF;
    --paper-border: #e0e0e0;

    /* Accent Colors */
    --success-green: #85a300;
    --hint-blue: #6c9ef8;

    /* Fonts */
    --font-brand: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-handwritten: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Lora', Georgia, 'Times New Roman', serif;

    /* Shadows */
    --shadow-paper: 0 2px 8px rgba(0, 0, 0, 0.08),
                     0 1px 4px rgba(0, 0, 0, 0.04);
    --shadow-lifted: 0 4px 12px rgba(0, 0, 0, 0.1),
                      0 2px 6px rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* ================================
   Progress Indicator
   ================================ */

.progress-container {
    padding: 48px 20px 32px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    z-index: 50;
    position: relative;
}

.progress-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
}

.progress-dot {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--paper-border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all 0.2s ease;
    cursor: pointer;
}

.dot-number {
    font-family: var(--font-brand);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-tertiary);
    transition: color 0.4s;
}

.progress-dot.active {
    background: var(--phoenix-orange);
    border-color: var(--phoenix-orange);
    transform: scale(1.1);
}

.progress-dot.active .dot-number {
    color: white;
}

.progress-dot.completed {
    background: var(--success-green);
    border-color: var(--success-green);
    animation: completePulse 0.6s ease-out;
}

.progress-dot.completed .dot-number {
    color: white;
}

.progress-dot.next-up {
    border: 2px solid var(--phoenix-orange);
    border-color: var(--phoenix-orange);
}

.progress-dot.next-up .dot-number {
    color: var(--phoenix-orange);
    font-weight: 700;
}

@keyframes completePulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.25); }
    100% { transform: scale(1); }
}

.progress-line {
    width: 40px;
    height: 2px;
    background: var(--paper-border);
    position: relative;
    overflow: hidden;
}

.progress-line.completed::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--success-green);
    animation: lineGrow 0.5s ease-out forwards;
}

@keyframes lineGrow {
    from { transform: scaleX(0); transform-origin: left; }
    to { transform: scaleX(1); }
}

/* ================================
   Paper Card with Torn Edges
   ================================ */

.game-container {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 10;
}

.paper-card {
    background: #FFFFFF !important;
    max-width: 720px;
    width: 100%;
    padding: 48px;
    position: relative;
    box-shadow: var(--shadow-paper);
    margin-bottom: 24px;

    /* Torn paper edges - organic and irregular */
    clip-path: polygon(
        0% 1.5%, 1% 0.5%, 2% 1.8%, 3% 0.8%, 4% 1.2%, 5% 0.3%, 6% 1.5%, 7% 0.9%,
        8% 1.7%, 9% 0.6%, 10% 1.3%, 12% 0.4%, 14% 1.6%, 16% 0.7%, 18% 1.4%,
        20% 1%, 23% 0.5%, 26% 1.2%, 30% 0.8%, 35% 1.5%, 40% 0.6%, 45% 1.1%,
        50% 0.9%, 55% 1.3%, 60% 0.7%, 65% 1.6%, 70% 0.4%, 74% 1.2%, 77% 0.8%,
        80% 1.4%, 82% 0.9%, 84% 1.1%, 86% 0.5%, 88% 1.5%, 90% 0.7%, 91% 1.3%,
        92% 0.6%, 93% 1.2%, 94% 0.8%, 95% 1.4%, 96% 0.9%, 97% 1.1%, 98% 0.5%,
        99% 1.2%, 100% 0.8%,

        100% 2%, 99.5% 4%, 99.8% 6%, 99.3% 8%, 99.7% 10%, 99.2% 12%, 99.6% 15%,
        99.4% 18%, 99.8% 22%, 99.1% 26%, 99.5% 30%, 99.3% 35%, 99.7% 40%,
        99.4% 45%, 99.6% 50%, 99.2% 55%, 99.8% 60%, 99.3% 65%, 99.6% 70%,
        99.4% 74%, 99.7% 78%, 99.3% 82%, 99.6% 86%, 99.2% 90%, 99.5% 93%,
        99.7% 96%, 99.4% 98%, 99.8% 99%, 99.2% 99.5%, 99.6% 100%,

        99% 99.5%, 97% 99.8%, 95% 99.2%, 93% 99.6%, 91% 99.3%, 89% 99.7%,
        87% 99.4%, 85% 99.8%, 82% 99.2%, 79% 99.5%, 76% 99.3%, 73% 99.7%,
        69% 99.4%, 65% 99.6%, 60% 99.2%, 55% 99.8%, 50% 99.1%, 45% 99.5%,
        40% 99.3%, 35% 99.7%, 30% 99.4%, 26% 99.6%, 22% 99.2%, 18% 99.8%,
        15% 99.3%, 12% 99.6%, 10% 99.4%, 8% 99.7%, 6% 99.3%, 4% 99.6%,
        2% 99.2%, 1% 99.5%, 0.5% 99.8%,

        0.8% 98%, 0.3% 96%, 0.7% 94%, 0.4% 92%, 0.9% 90%, 0.2% 87%, 0.6% 84%,
        0.4% 81%, 0.8% 78%, 0.3% 74%, 0.7% 70%, 0.5% 66%, 0.9% 62%, 0.2% 58%,
        0.6% 54%, 0.4% 50%, 0.8% 46%, 0.3% 42%, 0.7% 38%, 0.5% 34%, 0.9% 30%,
        0.2% 26%, 0.6% 22%, 0.4% 18%, 0.8% 15%, 0.3% 12%, 0.7% 9%, 0.5% 6%,
        0.9% 4%, 0.3% 2%
    );
}

.paper-card.section {
    display: none;
}

.paper-card.section.active {
    display: block;
}

/* Pencil sketch underline effect */
.section-title {
    font-family: var(--font-brand);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--phoenix-orange);
    margin-bottom: 8px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg,
        var(--phoenix-orange) 0%,
        var(--phoenix-gold) 50%,
        var(--phoenix-orange) 100%);
    opacity: 0.4;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.section-header {
    margin-bottom: 32px;
}

/* ================================
   Task Instruction
   ================================ */

.task-instruction {
    background: #FFFFFF;
    border-left: 4px solid var(--phoenix-orange);
    padding: 20px 24px;
    border-radius: 8px;
    margin-bottom: 32px;
    display: flex;
    align-items: start;
    gap: 12px;
}

.instruction-icon {
    font-size: 1.8rem;
    line-height: 1;
}

.task-instruction p {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-primary);
}

/* ================================
   Video Container
   ================================ */

/* ================================
   Features Grid (Section 1)
   ================================ */

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 32px;
}

.feature-item {
    border-radius: 8px;
    overflow: hidden;
    background: var(--bg-tertiary);
    border: 1px solid var(--paper-border);
}

.feature-item img {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 360px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ================================
   Get Started Button
   ================================ */

.get-started-container {
    text-align: center;
    margin-top: 32px;
}

.get-started-button {
    background: var(--phoenix-orange);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-family: var(--font-brand);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(216, 147, 51, 0.3);
}

.get-started-button:hover {
    background: var(--phoenix-gold);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(216, 147, 51, 0.4);
}

.get-started-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(216, 147, 51, 0.3);
}

.get-started-button i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.get-started-button:hover i {
    transform: translateX(4px);
}

/* ================================
   Playground Area
   ================================ */

.playground {
    background: #FFFFFF;
    border: 2px dashed var(--paper-border);
    border-radius: 12px;
    padding: 48px 32px;
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 160px;
    position: relative;
}

.editable-container {
    text-align: center;
}

.editable-text {
    font-family: var(--font-brand);
    font-size: 2rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    display: inline-block;
    position: relative;
    outline: none;
    background: transparent;
    transition: color 0.3s ease;
}

.image-container {
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
}

.replaceable-image {
    max-width: 100%;
    width: 400px;
    height: auto;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.replaceable-image:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 20px rgba(216, 147, 51, 0.3);
}

.replaceable-image:active {
    transform: scale(0.98);
}

/* ================================
   Section 4: Cards Container & Demo Cards
   ================================ */

.cards-container {
    display: flex;
    gap: 16px;
    justify-content: center;
    align-items: stretch;
    flex-wrap: wrap;
    width: 100%;
    max-width: 540px;
    margin: 0 auto;
}

.demo-card {
    background: #FFFFFF;
    border: 1.5px solid var(--paper-border);
    border-radius: 10px;
    padding: 18px;
    flex: 0 1 calc(50% - 8px);
    max-width: calc(50% - 8px);
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.demo-card:hover {
    box-shadow: 0 6px 20px rgba(216, 147, 51, 0.15);
    border-color: var(--phoenix-orange);
}

.card-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 6px;
    background: var(--bg-tertiary);
}

.card-title {
    font-family: var(--font-brand);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.card-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
    flex: 1;
}

.card-button {
    background: var(--phoenix-orange);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-family: var(--font-brand);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.card-button:hover {
    background: var(--phoenix-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(216, 147, 51, 0.3);
}

.card-button:active {
    transform: translateY(0);
}

/* ================================
   Section 6: Link Demo & Mode Explanation
   ================================ */

.link-demo-container {
    text-align: center;
    max-width: 400px;
}

.link-demo-text {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin: 0;
}

.demo-link {
    color: var(--phoenix-orange);
    text-decoration: underline;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.2s ease;
}

.demo-link:hover {
    color: var(--phoenix-gold);
}

.mode-explanation {
    background: rgba(108, 158, 248, 0.06);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
}

.mode-title {
    font-family: var(--font-brand);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 16px 0;
    text-align: center;
}

.mode-cards {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.mode-card {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    background: #FFFFFF;
    border: 1.5px solid var(--paper-border);
    border-radius: 8px;
    padding: 14px 16px;
    transition: all 0.2s ease;
}

.mode-card:hover {
    border-color: var(--phoenix-orange);
    box-shadow: 0 2px 8px rgba(216, 147, 51, 0.12);
}

.edit-mode-card .mode-icon {
    color: var(--phoenix-orange);
}

.preview-mode-card .mode-icon {
    color: var(--phoenix-gold);
}

.mode-icon-svg {
    width: 20px;
    height: 20px;
}

.mode-icon {
    font-size: 1.3rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(216, 147, 51, 0.1);
    border-radius: 8px;
    flex-shrink: 0;
}


.mode-info {
    flex: 1;
}

.mode-info strong {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    margin-bottom: 2px;
}

.mode-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.arrow-pointer {
    position: fixed;
    top: 8px;
    z-index: 9999;
    pointer-events: none;
    background: #3c3f41;
    padding: 6px 10px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.arrow-pointer.visible {
    opacity: 1;
    visibility: visible;
}

.arrow-pointer.arrow-left {
    /* Shifted right by one live-preview toolbar button width (~30px) from
       the original 30px to follow the pencil (edit-mode) toggle, which
       moved one slot to the right after the design-mode toggle was added
       between reload and the old preview button. */
    left: 60px;
    animation: arrowBounce 1s ease-in-out infinite;
}

.arrow-pointer i {
    font-size: 1.5rem;
    color: var(--phoenix-gold);
}

.arrow-pointer .arrow-svg {
    width: 18px;
    height: 18px;
    display: block;
}

@keyframes arrowBounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

.mode-hint {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    text-align: center;
    flex: 1;
}

.mode-hint strong {
    color: var(--text-primary);
    background: rgba(216, 147, 51, 0.12);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.play-button-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    background: #3c3f41;
    color: var(--phoenix-gold);
    border-radius: 4px;
    font-size: 0.7rem;
    vertical-align: middle;
    margin: 0 2px;
}

.play-hint-svg {
    width: 12px;
    height: 12px;
}

/* ================================
   Bonus Badge
   ================================ */

.bonus-badge {
    display: block;
    background: linear-gradient(135deg, var(--phoenix-orange) 0%, var(--phoenix-gold) 100%);
    color: white;
    font-family: var(--font-brand);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 12px;
    border-radius: 4px;
    margin: 0 auto 16px auto;
    width: fit-content;
    text-align: center;
    box-shadow: 0 2px 8px rgba(216, 147, 51, 0.25);
}

/* Bonus slide special styling */
.bonus-slide .section-header {
    text-align: center;
}

.bonus-slide .section-title {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.bonus-slide .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

/* ================================
   Section 7: Alignment Demo
   ================================ */

.alignment-demo {
    display: flex;
    gap: 32px;
    justify-content: center;
    align-items: flex-start;
}

.align-box {
    width: 100px;
    height: 100px;
    background: var(--bg-tertiary);
    border: 1.5px solid var(--paper-border);
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
}

.align-box span {
    font-family: var(--font-brand);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.align-box .inline-icon {
    width: 16px;
    height: 16px;
}

.align-box.misaligned {
    margin-top: 5px;
}

@media (max-width: 480px) {
    .alignment-demo {
        gap: 20px;
    }

    .align-box {
        width: 72px;
        height: 72px;
    }

    .align-box span {
        font-size: 0.85rem;
    }

    .align-box.misaligned {
        margin-top: 4px;
    }
}

/* ================================
   Section 8: Completion Slide
   ================================ */

.completion-slide {
    text-align: center;
}

.completion-content {
    padding: 40px 20px;
}

.completion-icon {
    margin-bottom: 24px;
    animation: rocketFloat 2s ease-in-out infinite;
}

.completion-icon-svg {
    width: 64px;
    height: 64px;
}

@keyframes rocketFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.completion-title {
    font-family: var(--font-brand);
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 12px 0;
    background: linear-gradient(135deg, var(--phoenix-orange) 0%, var(--phoenix-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.completion-body {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0 0 28px 0;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.completion-helper {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin: 0 0 16px 0;
}

.resource-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 24px;
    background: #FFFFFF;
    border: 1.5px solid var(--paper-border);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-family: var(--font-brand);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.resource-link:hover {
    border-color: var(--phoenix-orange);
    box-shadow: 0 4px 12px rgba(216, 147, 51, 0.15);
    transform: translateY(-2px);
}

.resource-link i {
    font-size: 1.2rem;
}

.resource-link .fa-book {
    color: var(--phoenix-orange);
}

.resource-link .fa-youtube {
    color: #FF0000;
}

/* ================================
   Section 5: Sticky Notes
   ================================ */

.notes-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.sticky-note {
    background: linear-gradient(180deg, #FFFDE7 0%, #FFFDE7 16px, #FFF9C4 16px, #FFF9C4 100%);
    border: none;
    border-radius: 2px;
    padding: 28px 20px 22px 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12),
                0 1px 2px rgba(0, 0, 0, 0.08),
                inset 0 -40px 40px -40px rgba(0, 0, 0, 0.02),
                inset 0 16px 0 0 rgba(0, 0, 0, 0.02);
    transition: all 0.3s ease;
    cursor: grab;
    position: relative;
    font-family: 'Segoe UI', 'Arial', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    color: #424242;
    text-align: left;
    user-select: none;
    line-height: 1.4;
}

.sticky-note:hover {
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15),
                0 2px 4px rgba(0, 0, 0, 0.1),
                inset 0 -40px 40px -40px rgba(0, 0, 0, 0.02),
                inset 0 16px 0 0 rgba(0, 0, 0, 0.02);
    transform: translateY(-2px) rotate(0.5deg);
}

.sticky-note:active {
    cursor: grabbing;
}

/* ================================
   Success Message
   ================================ */

.success-message {
    background: rgba(133, 163, 0, 0.08);
    border: 1.5px solid var(--success-green);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 24px;
    display: none;
    align-items: center;
    gap: 10px;
    animation: successPop 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    box-shadow: 0 2px 8px rgba(133, 163, 0, 0.1);
}

.success-message.show {
    display: flex;
}

@keyframes successPop {
    0% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.success-icon {
    font-size: 1.5rem;
    line-height: 1;
    color: var(--success-green);
    animation: rotate 0.6s ease-out;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes rotate {
    from { transform: rotate(-180deg) scale(0); }
    to { transform: rotate(0) scale(1); }
}

.success-message p {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--success-green);
    margin: 0;
    line-height: 1.5;
}

/* ================================
   Progress Toast
   ================================ */

.progress-toast {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    background: rgba(216, 147, 51, 0.95);
    border: 1.5px solid var(--phoenix-orange);
    border-radius: 8px;
    padding: 12px 24px;
    display: none;
    align-items: center;
    justify-content: center;
    animation: toastSlideIn 0.4s ease-out;
    box-shadow: 0 4px 16px rgba(216, 147, 51, 0.3);
    backdrop-filter: blur(8px);
}

.progress-toast.show {
    display: flex;
}

.progress-toast.hiding {
    animation: toastFadeOut 0.3s ease-out forwards;
}

@keyframes toastSlideIn {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes toastFadeOut {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
}

.progress-toast p {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 600;
    color: #FFFFFF;
    margin: 0;
    line-height: 1.5;
    text-align: center;
}

.progress-toast span {
    font-weight: 600;
    transition: all 0.3s ease;
}

/* ================================
   Undo Message
   ================================ */

.undo-message {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    background: rgba(220, 53, 69, 0.95);
    border: 1.5px solid #dc3545;
    border-radius: 8px;
    padding: 12px 24px;
    display: none;
    align-items: center;
    justify-content: center;
    gap: 12px;
    animation: toastSlideIn 0.4s ease-out;
    box-shadow: 0 4px 16px rgba(220, 53, 69, 0.4);
    backdrop-filter: blur(8px);
}

.undo-message.show {
    display: flex;
}

.undo-message.hiding {
    animation: toastFadeOut 0.3s ease-out forwards;
}

.undo-message .warning-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.undo-message p {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 600;
    color: #FFFFFF;
    margin: 0;
    line-height: 1.5;
    text-align: center;
}

.undo-message strong {
    font-weight: 700;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 4px;
}

/* ================================
   Slide Controls (Prev/Hint/Next)
   ================================ */

.slide-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 32px;
    margin-bottom: 16px;
}

.slide-nav-button {
    background: transparent;
    border: 1.5px solid var(--paper-border);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 6px;
    font-family: var(--font-brand);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    flex: 0 1 auto;
}

.slide-nav-button:hover:not(:disabled) {
    background: rgba(216, 147, 51, 0.08);
    border-color: var(--phoenix-orange);
    color: var(--phoenix-orange);
}

.slide-nav-button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.slide-nav-button.highlighted {
    background: var(--phoenix-orange);
    border-color: var(--phoenix-orange);
    color: white;
    box-shadow: 0 4px 12px rgba(216, 147, 51, 0.3);
}

.slide-nav-button.highlighted:hover {
    background: var(--phoenix-gold);
    border-color: var(--phoenix-gold);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(216, 147, 51, 0.4);
}

.slide-nav-button.one-more {
    background: linear-gradient(135deg, var(--phoenix-orange) 0%, var(--phoenix-gold) 100%);
    border: none;
    color: white;
    box-shadow: 0 4px 12px rgba(216, 147, 51, 0.3);
    animation: gentlePulse 2s ease-in-out infinite;
}

.slide-nav-button.one-more:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(216, 147, 51, 0.4);
    animation: none;
}

.slide-nav-button.one-more i {
    color: #fff;
}

.slide-nav-button.one-more:hover i {
    color: var(--phoenix-orange);
}

@keyframes gentlePulse {
    0%, 100% {
        box-shadow: 0 4px 12px rgba(216, 147, 51, 0.3);
    }
    50% {
        box-shadow: 0 4px 20px rgba(216, 147, 51, 0.5);
    }
}

.slide-nav-button.finish {
    background: var(--success-green);
    border-color: var(--success-green);
    color: white;
    box-shadow: 0 4px 12px rgba(133, 163, 0, 0.3);
}

.slide-nav-button.finish:hover {
    background: #96b800;
    border-color: #96b800;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(133, 163, 0, 0.4);
}

.slide-nav-button i {
    font-size: 0.85rem;
}

.hint-button-inline {
    background: var(--hint-blue);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    flex: 0 0 auto;
}

.hint-button-inline:hover {
    background: #5a9cfa;
}

.hint-button-inline:active {
    background: #4a7ee0;
}

.hint-button-inline i {
    font-size: 1rem;
}

.hint-content-inline {
    padding: 20px 24px;
    background: rgba(108, 158, 248, 0.08);
    border-left: 4px solid var(--hint-blue);
    border-radius: 8px;
    display: none;
}

.hint-content-inline.visible {
    display: block;
}

.hint-content-inline ol {
    margin-left: 20px;
    margin-bottom: 0;
}

.hint-content-inline li {
    margin-bottom: 8px;
    color: var(--text-primary);
}

.hint-content-inline li:last-child {
    margin-bottom: 0;
}

.hint-content-inline p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.inline-icon {
    width: 18px;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
    object-fit: contain;
    margin: 0 2px;
}

.hint-content-inline .inline-icon {
    filter: invert(52%) sepia(70%) saturate(2078%) hue-rotate(197deg) brightness(100%) contrast(95%);
}

.success-message .inline-icon {
    filter: invert(56%) sepia(19%) saturate(1485%) hue-rotate(38deg) brightness(93%) contrast(88%);
}

/* ================================
   Placeholder Content
   ================================ */

.placeholder-content {
    text-align: center;
    padding: 60px 20px;
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.placeholder-content p {
    font-size: 1.2rem;
    color: var(--text-tertiary);
    font-style: italic;
}

/* ================================
   Navigation Controls
   ================================ */

.nav-button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 12px;
    transition: all 0.3s ease;
    flex-shrink: 0;
    font-family: var(--font-brand);
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-button:hover:not(:disabled) {
    color: var(--phoenix-orange);
}

.nav-button:disabled {
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.3;
}

.nav-button.highlighted {
    background: var(--phoenix-orange);
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(216, 147, 51, 0.3);
}

.nav-button.highlighted:hover {
    background: var(--phoenix-gold);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(216, 147, 51, 0.4);
}

.nav-button i {
    font-size: 1rem;
}

.nav-text {
    display: inline-block;
}

/* ================================
   Footer
   ================================ */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--paper-border);
    padding: 20px;
    text-align: center;
    margin-top: auto;
    z-index: 50;
    position: relative;
}

.footer-text {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--text-tertiary);
}

.footer-tagline {
    font-family: var(--font-brand);
    font-size: 0.95rem;
    color: var(--phoenix-orange);
    font-weight: 500;
}

.footer-separator {
    margin: 0 12px;
    color: var(--paper-border);
}

.footer-copyright {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ================================
   Confetti Animation
   ================================ */

.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--phoenix-orange);
    opacity: 0;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        opacity: 1;
        transform: translateY(-20px) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: translateY(100vh) rotate(720deg);
    }
}

/* ================================
   Responsive Design
   ================================ */

@media (max-width: 768px) {
    .progress-dot {
        width: 42px;
        height: 42px;
    }

    .dot-number {
        font-size: 1.1rem;
    }

    .progress-line {
        width: 30px;
    }

    .paper-card {
        padding: 32px 24px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .video-placeholder i {
        font-size: 3rem;
    }

    .video-placeholder p {
        font-size: 1rem;
    }

    .editable-text {
        font-size: 2rem;
    }

    .nav-button {
        padding: 6px 10px;
        font-size: 0.9rem;
    }

    .progress-dot {
        width: 36px;
        height: 36px;
    }

    .progress-container {
        gap: 16px;
        padding: 24px 16px;
    }

    .progress-toast {
        padding: 10px 20px;
        top: 16px;
    }

    .progress-toast p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .progress-container {
        padding: 20px 10px;
    }

    .progress-dot {
        width: 32px;
        height: 32px;
    }

    .dot-number {
        font-size: 0.95rem;
    }

    .progress-line {
        width: 16px;
    }

    /* Section 6 responsive */
    .mode-cards {
        flex-direction: column;
        gap: 12px;
    }

    .mode-card {
        padding: 12px 14px;
    }

    .mode-icon {
        width: 32px;
        height: 32px;
        font-size: 1.1rem;
    }

    .mode-info strong {
        font-size: 0.9rem;
    }

    .mode-info p {
        font-size: 0.8rem;
    }

    .mode-explanation {
        padding: 18px;
    }

    .mode-title {
        font-size: 1.05rem;
    }

    .mode-hint {
        font-size: 0.85rem;
    }

    .link-demo-text {
        font-size: 1rem;
    }

    /* Completion slide responsive */
    .completion-icon-svg {
        width: 48px;
        height: 48px;
    }

    .completion-title {
        font-size: 1.6rem;
    }

    .completion-body {
        font-size: 1rem;
    }

    .completion-helper {
        font-size: 0.9rem;
    }

    .resource-links {
        flex-direction: column;
        align-items: center;
    }

    .resource-link {
        width: 100%;
        max-width: 250px;
        justify-content: center;
    }

    .paper-card {
        padding: 24px 16px;
    }

    .progress-toast {
        padding: 10px 16px;
        top: 12px;
    }

    .progress-toast p {
        font-size: 0.85rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .editable-text {
        font-size: 1.6rem;
    }

    .task-instruction {
        padding: 16px;
        flex-direction: column;
        gap: 8px;
    }

    .playground {
        padding: 32px 16px;
    }

    .nav-button {
        padding: 6px 8px;
        font-size: 0.85rem;
        gap: 6px;
    }

    .nav-button i {
        font-size: 0.85rem;
    }

    .progress-container {
        gap: 12px;
        padding: 20px 12px;
    }

    .footer-text {
        font-size: 0.85rem;
    }

    .footer-tagline {
        display: block;
        margin-bottom: 4px;
    }

    .footer-separator {
        display: none;
    }

    .slide-controls {
        gap: 8px;
    }

    .slide-nav-button {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .slide-nav-button span {
        display: none;
    }

    .hint-button-inline {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .get-started-button {
        padding: 12px 24px;
        font-size: 1rem;
    }

    .cards-container {
        gap: 12px;
    }

    .demo-card {
        flex: 0 1 calc(50% - 6px);
        max-width: calc(50% - 6px);
        min-width: 0;
        padding: 14px;
        gap: 10px;
    }

    .card-image {
        height: 100px;
    }

    .card-title {
        font-size: 0.95rem;
    }

    .card-text {
        font-size: 0.8rem;
    }

    .card-button {
        padding: 7px 14px;
        font-size: 0.8rem;
    }
}

@media (max-width: 360px) {
    .cards-container {
        flex-wrap: wrap;
        gap: 16px;
    }

    .demo-card {
        flex: 1 1 100%;
        width: 100%;
        max-width: 100%;
    }

    .notes-container {
        max-width: 100%;
        gap: 12px;
    }

    .sticky-note {
        font-size: 1rem;
        padding: 16px 20px;
    }
}