/* ==========================================================================
   Design System & Root Variables
   ========================================================================== */
:root {
    /* Color Palette */
    --navy-deep: hsl(210, 60%, 8%);
    --navy-medium: #102A43;
    --gold-dark: #B89742;
    --gold-light: #E3C67C;
    --gold-gradient: linear-gradient(135deg, var(--gold-dark) 0%, var(--gold-light) 50%, var(--gold-dark) 100%);
    --accent-navy: linear-gradient(135deg, var(--navy-deep), var(--navy-medium));
    
    /* Backgrounds */
    --cream-bg: #FAF9F6;
    --cream-card: #FCFBFA;
    --desk-bg: #0F0F16; /* Same dark grey/black background as buttons */
    --desk-accent: radial-gradient(circle, rgba(184, 151, 66, 0.15) 0%, rgba(15, 15, 22, 0) 70%); /* Warm gold elegant ambient light */
    
    /* Typography */
    --serif-font: 'Cormorant Garamond', serif;
    --body-font: 'Inter', sans-serif;
    
    /* Ink/Text colors */
    --text-dark: #1E2E3E;
    --text-muted: #627D98;
    
    /* Shadows */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-hard: 0 20px 40px rgba(0, 0, 0, 0.3);
    --book-shadow-left: -15px 10px 30px rgba(0,0,0,0.15);
    --book-shadow-right: 15px 10px 30px rgba(0,0,0,0.15);
}

/* ==========================================================================
   Base resets & App Container
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--desk-bg);
    font-family: var(--body-font);
    color: var(--text-dark);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-container {
    width: 100%;
    min-height: 100vh;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    position: relative;
}

.ambient-light {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background: var(--desk-accent);
    z-index: 0;
    pointer-events: none;
}

/* ==========================================================================
   Book Layout (3D Flipbook)
   ========================================================================== */
.book-container {
    width: 960px;
    height: 600px;
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* Centering the book cover when closed front, and back when closed back */
.book-container.closed-front {
    transform: translateX(-240px);
}

.book-container.closed-back {
    transform: translateX(240px);
}

.book {
    width: 480px; /* One page width */
    height: 600px;
    position: absolute;
    left: 50%;
    perspective: 2000px;
    transform-style: preserve-3d;
}

.leaf {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    transform: rotateY(0deg);
    transform-style: preserve-3d;
    transform-origin: left center;
    transition: transform 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
    pointer-events: none;
}

.leaf.flipped {
    transform: rotateY(-180deg);
}

/* Enable pointer events only for active clickable pages */
.leaf.active-next,
.leaf.active-prev {
    pointer-events: auto;
    cursor: pointer;
}

/* Page Sides: Front and Back */
.page-side {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    background-color: var(--cream-bg);
    padding: 50px 45px;
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.page-side.front {
    transform: rotateY(0deg);
    z-index: 2;
    border-radius: 0 12px 12px 0;
    box-shadow: 5px 0 15px rgba(0,0,0,0.1), inset 0 0 40px rgba(0, 0, 0, 0.04);
}

.page-side.back {
    transform: rotateY(180deg);
    z-index: 1;
    border-radius: 12px 0 0 12px;
    box-shadow: -5px 0 15px rgba(0,0,0,0.1), inset 0 0 40px rgba(0, 0, 0, 0.04);
}

/* Spine shadow effects */
.page-side.front::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0) 100%);
    pointer-events: none;
}

.page-side.back::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 20px;
    height: 100%;
    background: linear-gradient(to left, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0) 100%);
    pointer-events: none;
}

.page-content {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* ==========================================================================
   Decorative Accents
   ========================================================================== */
.dot-grid {
    background-image: radial-gradient(var(--dot-color, #ccc) 1.5px, transparent 1.5px);
    background-size: 14px 14px;
    width: 112px;
    height: 112px;
    position: absolute;
    opacity: 0.75;
    pointer-events: none;
}

.dot-grid.gold {
    --dot-color: var(--gold-dark);
}

.dot-grid.gray {
    --dot-color: hsl(210, 15%, 75%);
}

.top-right-dots { top: -20px; right: -15px; }
.bottom-left-dots { bottom: -20px; left: -15px; }
.top-left-dots { top: -20px; left: -15px; }
.bottom-right-dots { bottom: -20px; right: -15px; }

/* Accent Bars */
.accent-bar {
    position: absolute;
    background: var(--gold-gradient);
    pointer-events: none;
}

.gold-vertical-left { left: -45px; top: -50px; width: 6px; height: 120%; }
.gold-vertical-right { right: -45px; top: -50px; width: 6px; height: 120%; }
.gold-vertical-right-thick { right: -45px; top: -50px; width: 14px; height: 120%; }
.gold-vertical-left-thick { left: -45px; top: -50px; width: 14px; height: 120%; }
.gold-vertical-right-side { right: -20px; top: -50px; width: 6px; height: 120%; }
.gold-vertical-left-side { left: -20px; top: -50px; width: 6px; height: 120%; }

.navy-horizontal-top { top: -50px; left: -45px; height: 10px; width: 70%; background: var(--accent-navy); }
.gold-horizontal-bottom { bottom: -50px; left: -45px; height: 6px; width: 60%; }
.gold-horizontal-top { top: -50px; left: -45px; height: 6px; width: 120%; }
.navy-horizontal-bottom { bottom: -50px; left: -45px; height: 10px; width: 120%; background: var(--accent-navy); }
.navy-horizontal-bottom-wide { bottom: -50px; left: -45px; height: 14px; width: 120%; background: var(--accent-navy); }
.navy-horizontal-top-wide { top: -50px; left: -45px; height: 14px; width: 120%; background: var(--accent-navy); }
.gold-horizontal-top-right { top: -50px; right: -45px; height: 6px; width: 50%; }
.navy-vertical-left-thick { left: -45px; top: -50px; width: 14px; height: 120%; background: var(--accent-navy); }
.navy-horizontal-bottom-right { bottom: -50px; right: -45px; height: 10px; width: 70%; background: var(--accent-navy); }
.navy-horizontal-top-right { top: -50px; right: -45px; height: 10px; width: 75%; background: var(--accent-navy); }

/* ==========================================================================
   Typography & Common Elements
   ========================================================================== */
.serif-title {
    font-family: var(--serif-font);
    font-weight: 700;
    color: var(--navy-medium);
    line-height: 1.1;
}

.serif-title .highlight {
    font-weight: 400;
    font-style: italic;
    color: var(--gold-dark);
}

.section-subtitle {
    font-family: var(--body-font);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--gold-dark);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.body-text {
    font-family: var(--body-font);
    font-size: 11px;
    line-height: 1.6;
    color: var(--text-muted);
    font-weight: 300;
}

.text-justify {
    text-align: justify;
}

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

.page-title {
    font-size: 28px;
    margin-bottom: 25px;
    letter-spacing: 1px;
}

/* Image Placeholders */
.image-container {
    background-color: #ECEAE4;
    border: 1px solid rgba(16,42,67,0.08);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    border-radius: 2px;
}

.image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-image: repeating-linear-gradient(
        -45deg,
        rgba(184, 151, 66, 0.01) 0px,
        rgba(184, 151, 66, 0.01) 12px,
        rgba(16, 42, 67, 0.03) 12px,
        rgba(16, 42, 67, 0.03) 24px
    );
}

.placeholder-icon {
    font-size: 20px;
    opacity: 0.45;
    margin-bottom: 6px;
}

.placeholder-text {
    font-size: 8px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    text-transform: uppercase;
    opacity: 0.6;
}

/* ==========================================================================
   Page Specific Styles
   ========================================================================== */

/* 1. Cover Page */
.cover-page .cover-header h1 {
    font-size: 38px;
    margin-top: 20px;
}

.cover-hero {
    height: 290px;
    width: 100%;
    margin-top: 15px;
}

.logo-emblem {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--gold-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: absolute;
    bottom: 50px;
    left: -15px;
    box-shadow: 0 4px 15px rgba(184, 151, 66, 0.3);
}

.website-link {
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

/* 2. About Page */
.about-story {
    margin-bottom: 30px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 25px;
}

.employment-timeline .timeline-item {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.employment-timeline .timeline-item .year {
    font-size: 16px;
    font-weight: 700;
    color: var(--navy-medium);
}

.employment-timeline .timeline-desc strong {
    font-size: 10px;
    font-weight: 600;
    display: block;
    color: var(--text-dark);
}

/* 3. Studio Page */
.studio-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px solid rgba(16,42,67,0.1);
    padding-bottom: 8px;
    margin-bottom: 15px;
}

.studio-name {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--navy-medium);
}

.est-year {
    font-size: 12px;
    color: var(--gold-dark);
    font-style: italic;
}

.studio-intro {
    margin-bottom: 20px;
}

.studio-hero {
    flex-grow: 1;
    min-height: 200px;
}

/* 4. Projects Layout 1 */
.project-columns-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 18px;
    height: 100%;
}

.project-col-text {
    display: flex;
    flex-direction: column;
}

.client-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--navy-medium);
    margin-bottom: 20px;
}

.project-columns-grid .image-container.height-full {
    height: 100%;
    width: 100%;
}

/* 5. Projects Layout 2 */
.layout-2-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100%;
}

.landscape-hero {
    height: 240px;
    width: 100%;
}

.columns-two {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* 6. Projects Layout 3 */
.layout-3-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 25px;
    height: 100%;
}

.narrow-left {
    height: 100%;
}

.layout-3-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* 7. Projects Layout 4 */
.layout-4-content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.offset-center {
    height: 330px;
    width: 85%;
    margin: 0 auto;
    transform: rotate(1deg);
}

.layout-4-text-bottom {
    margin-top: 15px;
}

/* 8. Projects Layout 5 */
.layout-5-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 25px;
    height: 100%;
}

.layout-5-left {
    display: flex;
    flex-direction: column;
}

.layout-5-right {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 20px;
    height: 100%;
}

.stacked-item {
    height: 100%;
}

/* 9. Projects Layout 6 */
.layout-6-content {
    height: 100%;
}

.layout-6-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 25px;
    height: 100%;
}

.layout-6-right-img {
    position: relative;
    height: 100%;
}

.grid-img-large {
    width: 100%;
    height: 70%;
}

.grid-img-small {
    position: absolute;
    bottom: 0;
    left: -20px;
    width: 75%;
    height: 40%;
    z-index: 2;
    border: 3px solid var(--cream-bg);
}

/* 10. Back Cover Page */
.back-cover-page {
    background-color: var(--cream-bg);
}

.back-cover-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 80%;
}

.back-logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-navy);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 600;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin: 0 auto 30px;
    box-shadow: var(--shadow-soft);
}

.back-cover-center h3 {
    font-size: 30px;
    margin-bottom: 15px;
}

/* ==========================================================================
   Navigation Controls UI
   ========================================================================== */
.controls-container {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-top: 40px;
    background: rgba(255, 255, 255, 0.03);
    padding: 10px 25px;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    z-index: 2;
}

.control-btn {
    background: none;
    border: none;
    color: white;
    font-family: var(--body-font);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.control-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.control-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.control-btn:active:not(:disabled) {
    transform: translateY(1px);
}

.page-indicator {
    color: rgba(255, 255, 255, 0.7);
    font-size: 11px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

#currentPage {
    color: var(--gold-light);
    font-weight: 600;
}

.shortcuts-tip {
    margin-top: 15px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 10px;
    letter-spacing: 0.5px;
    z-index: 2;
}

.shortcuts-tip .key {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 11px;
}

/* ==========================================================================
   Responsive Adaptations (Mobile overrides)
   ========================================================================== */
@media (max-width: 990px) {
    body {
        display: block !important;
        height: auto;
        min-height: 100vh;
    }

    .app-container {
        padding: 80px 15px 40px 15px; /* Leave space for the close button at the top */
    }
    
    .book-container {
        transform: none !important;
        width: 100%;
        height: auto;
    }
    
    .book {
        position: relative !important;
        left: auto !important;
        width: 100%;
        max-width: 480px; /* Force single page size */
        height: auto;
        perspective: none;
        transform: none !important;
    }
    
    .leaf {
        position: static;
        width: 100%;
        height: auto;
        transform: none !important;
        transform-style: flat;
        display: flex;
        flex-direction: column;
        margin-bottom: 0;
        pointer-events: auto;
    }
    
    .page-side {
        position: relative !important; /* Fixes positioning context for accent bars */
        overflow: hidden !important;   /* Clips decorative bars neatly inside card */
        width: 100%;
        height: auto !important; /* Allow natural content height to avoid text clipping */
        min-height: 480px;
        transform: none !important;
        backface-visibility: visible;
        margin-bottom: 30px;
        border-radius: 12px !important;
        box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
        padding: 30px 20px;
    }
    
    .page-content {
        flex-grow: 1;
    }
    
    .accent-bar {
        display: none !important; /* Hide decorative lines on mobile to prevent text overlay and alignment issues */
    }
    
    .page-side.back {
        transform: none !important;
    }
    
    .page-side::after {
        display: none !important; /* Hide spine shadows */
    }
    
    .controls-container, 
    .shortcuts-tip {
        display: none !important; /* Hide navigation UI as users scroll */
    }
    
    /* Layout adjustments for smartphone screens */
    .about-grid,
    .project-columns-grid,
    .columns-two,
    .layout-3-grid,
    .layout-5-grid,
    .layout-6-grid {
        display: grid;
        grid-template-columns: 1fr !important;
        gap: 20px !important;
        height: auto !important;
    }

    .project-columns-grid .image-container {
        height: 160px !important;
        width: 100% !important;
    }

    .narrow-left {
        height: 180px !important;
        width: 100% !important;
    }

    .landscape-hero {
        height: 160px !important;
    }

    .offset-center {
        height: 180px !important;
        width: 100% !important;
        transform: none !important;
        margin: 10px 0 !important;
    }

    .layout-5-right {
        grid-template-rows: auto auto !important;
    }

    .stacked-item {
        height: 160px !important;
    }

    .layout-6-right-img {
        height: 240px !important;
        margin-top: 10px;
    }

    .grid-img-large {
        height: 100% !important;
    }

    .grid-img-small {
        height: 50% !important;
        bottom: 0;
        left: -10px !important;
    }

    /* Typography fixes for smartphones */
    .serif-title {
        font-size: 24px !important;
    }

    .cover-page .cover-header h1 {
        font-size: 32px !important;
        margin-top: 10px !important;
    }

    .cover-hero {
        height: 200px !important;
        margin-top: 10px !important;
    }

    .logo-emblem {
        bottom: 20px !important;
        left: 10px !important;
        width: 60px !important;
        height: 60px !important;
    }

    .back-logo {
        margin: 0 auto 15px !important;
        width: 50px !important;
        height: 50px !important;
    }

    .back-cover-center h3 {
        font-size: 22px !important;
    }

    .page-title {
        font-size: 24px !important;
        margin-bottom: 15px !important;
    }

    .body-text {
        font-size: 11px !important;
        line-height: 1.5 !important;
    }

    .skills-bullet-list li {
        font-size: 10.5px !important;
    }

    .personal-details-table td {
        font-size: 11px !important;
    }
}

/* Custom Scale Wrapper to increase presentation size by 25% */
.book-scale-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    transition: transform 0.3s ease;
    margin: auto;
}

@media (min-width: 991px) {
    .book-scale-wrapper {
        transform-origin: center center;
        margin: auto;
    }
}