/* ========================================
   PPADDL.com - Styles
   Cinematic naturalism, horizontal paddle journey
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --river-deep: #1a2e35;
    --dawn-sky: #e8c4b8;
    --mist: #d5dee4;
    --ink: #2c2a26;
    --dusk-amber: #c9883a;
    --paddle-wood: #a67c52;
    --foam-white: #f4f0eb;
    --rapid-blue: #3b7ea1;

    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;
    --font-mono: 'DM Mono', 'Courier New', monospace;

    --scroll-progress: 0;
    --viewport-w: 100vw;
    --viewport-h: 100vh;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow: hidden;
    height: 100%;
    background-color: var(--foam-white);
}

body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--ink);
    background-color: var(--foam-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- SVG Filters (hidden) --- */
.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* --- Loader --- */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--foam-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-path {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    animation: paddle-draw 2.4s ease-in-out infinite;
}

@keyframes paddle-draw {
    0% { stroke-dashoffset: 500; }
    50% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -500; }
}

/* --- Treeline Parallax --- */
.treeline {
    position: fixed;
    top: 0;
    left: 0;
    width: 400vw;
    height: 120px;
    z-index: 5;
    opacity: 0.08;
    pointer-events: none;
    will-change: transform;
}

.treeline svg {
    width: 100%;
    height: 100%;
}

/* --- Cursor Wake Trail --- */
.cursor-wake {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    overflow: hidden;
}

.wake-circle {
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1.5px solid var(--rapid-blue);
    opacity: 0.15;
    transform: scale(0.2);
    animation: wake-expand 800ms ease-out forwards;
    pointer-events: none;
}

@keyframes wake-expand {
    0% {
        transform: scale(0.2);
        opacity: 0.15;
    }
    100% {
        transform: scale(2.5);
        opacity: 0;
    }
}

/* --- Ripple Container --- */
.ripple-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9997;
    overflow: hidden;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    border: 1.5px solid var(--rapid-blue);
    opacity: 0.2;
    transform: scale(0);
    animation: ripple-expand 1.5s ease-out forwards;
    pointer-events: none;
}

.ripple:nth-child(2) {
    animation-delay: 0.2s;
}

.ripple:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes ripple-expand {
    0% {
        transform: scale(0);
        opacity: 0.2;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

/* --- Main River (Horizontal Scroll Container) --- */
.river {
    display: flex;
    width: fit-content;
    height: 100vh;
    overflow-x: scroll;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    touch-action: pan-x;
    -webkit-overflow-scrolling: touch;
}

/* Hide scrollbar */
.river::-webkit-scrollbar {
    display: none;
}
.river {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* --- Viewport Sections --- */
.viewport {
    flex: 0 0 100vw;
    width: 100vw;
    height: 100vh;
    scroll-snap-align: start;
    position: relative;
    overflow: hidden;
}

/* --- Viewport 1: The Launch --- */
.viewport-launch {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--river-deep) 0%, var(--mist) 50%, var(--dawn-sky) 100%);
}

.launch-atmosphere {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.gradient-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.gradient-water {
    background: linear-gradient(180deg,
        transparent 0%,
        rgba(26, 46, 53, 0.3) 60%,
        rgba(26, 46, 53, 0.6) 100%
    );
}

.gradient-sky {
    background: linear-gradient(180deg,
        rgba(232, 196, 184, 0.4) 0%,
        rgba(213, 222, 228, 0.2) 40%,
        transparent 70%
    );
}

.gradient-treeline {
    background: linear-gradient(180deg,
        transparent 30%,
        rgba(26, 46, 53, 0.05) 45%,
        transparent 50%
    );
}

.launch-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

/* --- Logotype Typewriter Effect --- */
.logotype {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 9rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--foam-white);
    display: inline-block;
    text-shadow: 0 2px 40px rgba(26, 46, 53, 0.3);
}

.letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    animation: letter-reveal 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    animation-delay: calc(1.2s * var(--i) + 0.5s);
}

@keyframes letter-reveal {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.launch-tagline {
    font-family: var(--font-body);
    font-size: clamp(0.9rem, 2vw, 1.3rem);
    color: rgba(244, 240, 235, 0.7);
    margin-top: 1.5rem;
    opacity: 0;
    animation: fade-in 1s ease forwards;
    animation-delay: 8s;
    font-style: italic;
}

@keyframes fade-in {
    to { opacity: 1; }
}

/* --- Scroll Hint Arrow --- */
.scroll-hint {
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: hint-pulse 2s ease-in-out infinite;
    animation-delay: 9s;
    opacity: 0;
}

.scroll-hint {
    animation: hint-appear 0.5s ease forwards 9s, hint-pulse 2s ease-in-out infinite 9.5s;
}

@keyframes hint-appear {
    to { opacity: 0.6; }
}

@keyframes hint-pulse {
    0%, 100% { transform: translateX(-50%) translateX(0); opacity: 0.6; }
    50% { transform: translateX(-50%) translateX(10px); opacity: 1; }
}

.scroll-arrow {
    display: block;
}

/* --- River Viewports (2-5) --- */
.viewport-river {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3vw;
    padding: 5vh 5vw;
    background: linear-gradient(135deg, var(--foam-white) 0%, var(--mist) 50%, var(--dawn-sky) 30%);
}

/* --- Content Panels --- */
.panel {
    position: relative;
    transform: rotate(var(--rotation, 0deg));
    max-width: 42vw;
    padding: 0;
    will-change: transform, opacity;
}

.panel-a {
    align-self: flex-start;
    margin-top: 8vh;
}

.panel-b {
    align-self: flex-end;
    margin-bottom: 8vh;
}

.panel-wide {
    max-width: 65vw;
    align-self: center;
}

.panel-final {
    max-width: 55vw;
    margin: 0 auto;
}

.panel-content {
    position: relative;
    z-index: 2;
    padding: clamp(1.5rem, 3vw, 3rem);
    max-width: 55ch;
}

/* --- Torn Paper Edge Masks --- */
.torn-1 { clip-path: url(#torn-edge-1); }
.torn-2 { clip-path: url(#torn-edge-2); }
.torn-3 { clip-path: url(#torn-edge-3); }
.torn-4 { clip-path: url(#torn-edge-4); }

/* --- Watercolor Wash Backgrounds --- */
.watercolor-wash {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    z-index: 1;
    filter: url(#watercolor-filter);
    border-radius: 4px;
}

.wash-1 {
    background:
        radial-gradient(ellipse at 20% 30%, rgba(232, 196, 184, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 60%, rgba(213, 222, 228, 0.12) 0%, transparent 55%),
        radial-gradient(ellipse at 50% 80%, rgba(201, 136, 58, 0.08) 0%, transparent 50%),
        linear-gradient(135deg, var(--foam-white) 0%, rgba(244, 240, 235, 0.95) 100%);
    filter: url(#watercolor-filter);
}

.wash-2 {
    background:
        radial-gradient(ellipse at 30% 20%, rgba(213, 222, 228, 0.15) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(232, 196, 184, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 40% 50%, rgba(166, 124, 82, 0.08) 0%, transparent 50%),
        linear-gradient(145deg, var(--foam-white) 0%, rgba(244, 240, 235, 0.92) 100%);
    filter: url(#watercolor-filter-2);
}

.wash-3 {
    background:
        radial-gradient(ellipse at 60% 40%, rgba(232, 196, 184, 0.13) 0%, transparent 55%),
        radial-gradient(ellipse at 20% 70%, rgba(213, 222, 228, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(201, 136, 58, 0.06) 0%, transparent 45%),
        linear-gradient(160deg, var(--foam-white) 0%, rgba(244, 240, 235, 0.9) 100%);
    filter: url(#watercolor-filter-3);
}

.wash-rapid-1 {
    background:
        radial-gradient(ellipse at 30% 40%, rgba(59, 126, 161, 0.12) 0%, transparent 55%),
        radial-gradient(ellipse at 70% 60%, rgba(26, 46, 53, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 20%, rgba(213, 222, 228, 0.08) 0%, transparent 45%),
        linear-gradient(135deg, rgba(26, 46, 53, 0.05) 0%, var(--foam-white) 100%);
    filter: url(#watercolor-filter);
}

.wash-rapid-2 {
    background:
        radial-gradient(ellipse at 40% 30%, rgba(26, 46, 53, 0.1) 0%, transparent 55%),
        radial-gradient(ellipse at 60% 70%, rgba(59, 126, 161, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(201, 136, 58, 0.06) 0%, transparent 45%),
        linear-gradient(150deg, rgba(26, 46, 53, 0.03) 0%, var(--foam-white) 100%);
    filter: url(#watercolor-filter-2);
}

.wash-shore {
    background:
        radial-gradient(ellipse at 50% 50%, rgba(201, 136, 58, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 20% 30%, rgba(232, 196, 184, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(166, 124, 82, 0.08) 0%, transparent 45%),
        linear-gradient(135deg, var(--foam-white) 0%, rgba(201, 136, 58, 0.08) 100%);
    filter: url(#watercolor-filter-3);
}

/* --- Panel entrance animation --- */
.panel {
    opacity: 0;
    transform: rotate(var(--rotation, 0deg)) translateX(20px);
    transition: opacity 600ms cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.panel.visible {
    opacity: 1;
    transform: rotate(var(--rotation, 0deg)) translateX(0);
}

/* --- Typography --- */
h2 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--river-deep);
    margin-bottom: 1rem;
    line-height: 1.2;
}

p {
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--ink);
    margin-bottom: 1rem;
    max-width: 55ch;
}

p:last-child {
    margin-bottom: 0;
}

.coordinate {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--rapid-blue);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 0.75rem;
    opacity: 0.7;
}

/* --- Viewport 6: The Stillwater --- */
.viewport-stillwater {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg,
        var(--dawn-sky) 0%,
        var(--mist) 40%,
        var(--foam-white) 100%
    );
}

.stillwater-content {
    text-align: center;
    max-width: 80vw;
}

.stillwater-phrase {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 7rem);
    font-weight: 400;
    font-style: italic;
    color: var(--river-deep);
    letter-spacing: -0.03em;
    line-height: 1.3;
    opacity: 0;
    transition: opacity 1.5s ease;
    max-width: none;
}

.stillwater-phrase.visible {
    opacity: 1;
}

/* --- Viewports 7-9: The Rapids --- */
.viewport-rapids {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2vw;
    padding: 5vh 4vw;
    background: linear-gradient(135deg,
        var(--river-deep) 0%,
        rgba(26, 46, 53, 0.8) 30%,
        var(--mist) 70%,
        rgba(59, 126, 161, 0.2) 100%
    );
}

.viewport-rapids h2 {
    color: var(--foam-white);
}

.viewport-rapids p {
    color: rgba(244, 240, 235, 0.9);
}

.viewport-rapids .coordinate {
    color: var(--rapid-blue);
    opacity: 0.9;
}

/* --- Counter Blocks --- */
.counter-block {
    text-align: center;
    padding: 2rem 0;
}

.counter-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--rapid-blue);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    display: block;
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.counter {
    font-family: var(--font-mono);
    font-size: 2rem;
    color: var(--rapid-blue);
    display: block;
    font-weight: 500;
}

/* --- Viewport 10: The Shore --- */
.viewport-shore {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg,
        var(--mist) 0%,
        var(--dawn-sky) 40%,
        var(--dusk-amber) 80%,
        rgba(201, 136, 58, 0.4) 100%
    );
}

.shore-content {
    text-align: center;
    width: 100%;
    padding: 5vh 5vw;
}

.shore-closing {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 400;
    font-style: italic;
    color: var(--river-deep);
    margin-top: 3rem;
    opacity: 0;
    transition: opacity 1.2s ease;
    max-width: none;
}

.shore-closing.visible {
    opacity: 1;
}

/* --- Waterline Progress Bar --- */
.waterline {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(26, 46, 53, 0.1);
    z-index: 9999;
    cursor: pointer;
}

.waterline-fill {
    height: 100%;
    width: 0%;
    background: var(--rapid-blue);
    transition: width 100ms linear, background-color 500ms ease;
    transform-origin: left;
}

.section-label {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--rapid-blue);
    opacity: 0;
    transition: opacity 0.5s ease;
    white-space: nowrap;
    letter-spacing: 0.05em;
    pointer-events: none;
}

.section-label.visible {
    opacity: 0.5;
}

/* --- Section Overlay (Mobile) --- */
.section-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 46, 53, 0.85);
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.section-overlay.active {
    opacity: 1;
    visibility: visible;
}

.section-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
}

.section-link {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--foam-white);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.3s ease;
    letter-spacing: -0.02em;
    padding: 0.5rem 1rem;
}

.section-link:hover,
.section-link:active {
    opacity: 1;
}

/* --- Paddle Divider SVG --- */
.paddle-divider-svg {
    display: none;
}

/* --- Paddle stroke divider within sections --- */
.paddle-divider {
    width: 200px;
    height: 20px;
    margin: 1.5rem 0;
    opacity: 0.4;
}

.paddle-divider-path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    animation: divider-draw 3s ease forwards;
}

@keyframes divider-draw {
    to { stroke-dashoffset: 0; }
}

/* --- Responsive / Mobile --- */
@media (max-width: 768px) {
    .river {
        flex-direction: column;
        width: 100%;
        height: auto;
        overflow-x: hidden;
        overflow-y: scroll;
        scroll-snap-type: y mandatory;
    }

    .viewport {
        flex: 0 0 100vh;
        width: 100vw;
        height: 100vh;
        scroll-snap-align: start;
    }

    .viewport-river,
    .viewport-rapids {
        flex-direction: column;
        gap: 3vh;
        padding: 5vh 5vw;
    }

    .panel {
        max-width: 90vw;
    }

    .panel-a {
        align-self: center;
        margin-top: 2vh;
    }

    .panel-b {
        align-self: center;
        margin-bottom: 2vh;
    }

    .panel-wide {
        max-width: 92vw;
    }

    .panel-final {
        max-width: 92vw;
    }

    .treeline {
        width: 100%;
        height: 80px;
    }

    /* Waterline on right edge for mobile vertical scroll */
    .waterline {
        bottom: auto;
        left: auto;
        top: 0;
        right: 0;
        width: 3px;
        height: 100%;
    }

    .waterline-fill {
        width: 100%;
        height: 0%;
        transition: height 100ms linear, background-color 500ms ease;
    }

    .section-label {
        bottom: auto;
        left: auto;
        right: 12px;
        top: 50%;
        transform: translateY(-50%) rotate(90deg);
        transform-origin: center;
    }

    .cursor-wake {
        display: none;
    }

    h2 {
        font-size: clamp(1.5rem, 6vw, 2.5rem);
    }

    .stillwater-phrase {
        font-size: clamp(2rem, 8vw, 4rem);
    }

    .logotype {
        font-size: clamp(2.5rem, 12vw, 5rem);
    }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    .letter {
        animation-duration: 0.01ms;
        animation-delay: 0.01ms;
    }

    .loader-path {
        animation: none;
        stroke-dashoffset: 0;
    }

    .wake-circle {
        animation-duration: 0.01ms;
    }

    .ripple {
        animation-duration: 0.01ms;
    }

    .panel {
        transition-duration: 0.01ms;
    }

    .watercolor-wash {
        filter: none;
    }
}

/* --- Selection --- */
::selection {
    background: rgba(59, 126, 161, 0.2);
    color: var(--ink);
}