/*
    General Styles
*/

:root {
    /* Dice dimensions */
    --dice-size: 110px;
    --dice-depth: calc(var(--dice-size) / 2);
    
    /* Layout spacing */
    --container-gap: 40px;
    
    /* Typography */
    --roll-font-size: 20px;
    --result-font-size: 16px;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    
    /* Button spacing */
    --roll-padding-block: 10px;
    --roll-padding-inline: 26px;
    --roll-margin-top: 32px;
    
    /* Pip sizing and positioning */
    --pip-scale: 1;
    --pip-size: calc(18px * var(--pip-scale));
    --pip-size-large: calc(30px * var(--pip-scale));
    --pip-offset-15: calc(15px * var(--pip-scale));
    --pip-offset-25: calc(25px * var(--pip-scale));
    --pip-offset-26: calc(26px * var(--pip-scale));
    --pip-offset-30: calc(30px * var(--pip-scale));
    --pip-offset-35: calc(35px * var(--pip-scale));
    --pip-offset-36: calc(36px * var(--pip-scale));
    --pip-offset-40: calc(40px * var(--pip-scale));
    --pip-offset-50: calc(50px * var(--pip-scale));
    --pip-offset-52: calc(52px * var(--pip-scale));
    
    /* Light theme colors */
    --bg-color: #F2F2F2;
    --text-color: #3f3d56;
    --dice-bg-start: #dddbd8;
    --dice-bg-end: #fff;
    --dice-border: #f6f3f0;
    --dice-depth-color: #f6f3f0;
    --pip-color: #131210;
    --pip-special-color: #f63330;
    --button-bg: #fff;
    --button-text: #3f3d56;
    --button-border: #ddd;
    --dice-outline-color: rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-dice: 0.6s cubic-bezier(.25, .8, .25, 1);
}

/* ============================================
   Theme: Dark Mode
   ============================================ */

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --dice-bg-start: #2a2a2a;
    --dice-bg-end: #3a3a3a;
    --dice-border: #2a2a2a;
    --dice-depth-color: #1a1a1a;
    --pip-color: #f0f0f0;
    --button-bg: #2a2a2a;
    --button-text: #e0e0e0;
    --button-border: #444;
    --dice-outline-color: rgba(255, 255, 255, 0.18);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --dice-bg-start: #2a2a2a;
        --dice-bg-end: #3a3a3a;
        --dice-border: #2a2a2a;
        --dice-depth-color: #1a1a1a;
        --pip-color: #f0f0f0;
        --button-bg: #2a2a2a;
        --button-text: #e0e0e0;
        --button-border: #444;
        --dice-outline-color: rgba(255, 255, 255, 0.18);
    }
}

/* ============================================
   Base Styles
   ============================================ */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    padding: clamp(16px, 6vw, 48px);
    font-family: var(--font-family);
    transition: background-color var(--transition-normal);
}

.container {
    display: grid;
    place-items: center;
    gap: var(--container-gap);
}

/* ============================================
   Dice Component
   ============================================ */

.dice {
    --current-rotation: rotateX(0deg) rotateY(0deg);
    --target-rotation: var(--current-rotation);
    position: relative;
    width: var(--dice-size);
    height: var(--dice-size);
    transform-style: preserve-3d;
    transform: var(--current-rotation);
    transition: transform var(--transition-dice);
    cursor: pointer;
}

.dice.is-rolling {
    animation: rolling 900ms ease forwards;
}

@keyframes rolling {
    0% {
        transform: var(--current-rotation);
    }
    50% {
        transform: rotateX(455deg) rotateY(455deg);
    }
    100% {
        transform: var(--target-rotation);
    }
}

/* ============================================
   Dice Faces
   ============================================ */

.face {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    border: 5px solid var(--dice-border);
    transform-style: preserve-3d;
    background: linear-gradient(145deg, var(--dice-bg-start), var(--dice-bg-end));
    transition: background var(--transition-normal), border-color var(--transition-normal);
    box-shadow: 0 0 0 2px var(--dice-outline-color);
}

.face::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background: var(--dice-depth-color);
    transform: translateZ(-1px);
    transition: background var(--transition-normal);
}

/* Face orientations */
.front  { transform: translateZ(var(--dice-depth)); }
.back   { transform: rotateX(180deg) translateZ(var(--dice-depth)); }
.top    { transform: rotateX(90deg) translateZ(var(--dice-depth)); }
.bottom { transform: rotateX(-90deg) translateZ(var(--dice-depth)); }
.right  { transform: rotateY(90deg) translateZ(var(--dice-depth)); }
.left   { transform: rotateY(-90deg) translateZ(var(--dice-depth)); }

/* ============================================
   Dice Pips (Dots)
   ============================================ */

.face::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: var(--pip-size);
    height: var(--pip-size);
    margin: calc(var(--pip-size) * -0.5) 0 0 calc(var(--pip-size) * -0.5);
    border-radius: 50%;
    background: var(--pip-color);
    transition: background var(--transition-normal);
    transform: translateZ(1px);
}

/* Face 1 (special) */
.front::after {
    width: var(--pip-size-large);
    height: var(--pip-size-large);
    margin: calc(var(--pip-size-large) * -0.5) 0 0 calc(var(--pip-size-large) * -0.5);
    background: var(--pip-special-color);
}

/* Face 2 */
.top::after {
    margin: calc(var(--pip-offset-30) * -1) 0 0 calc(var(--pip-offset-30) * -1);
    box-shadow: var(--pip-offset-40) var(--pip-offset-40) var(--pip-color);
}

/* Face 3 */
.left::after {
    margin: calc(var(--pip-offset-35) * -1) 0 0 calc(var(--pip-offset-35) * -1);
    box-shadow: 
        var(--pip-offset-25) var(--pip-offset-25) var(--pip-color),
        var(--pip-offset-50) var(--pip-offset-50) var(--pip-color);
}

/* Face 4 */
.right::after {
    margin: calc(var(--pip-offset-30) * -1) 0 0 calc(var(--pip-offset-30) * -1);
    box-shadow: 
        var(--pip-offset-40) 0 var(--pip-color),
        0 var(--pip-offset-40) var(--pip-color),
        var(--pip-offset-40) var(--pip-offset-40) var(--pip-color);
}

/* Face 5 */
.bottom::after {
    margin: calc(var(--pip-offset-36) * -1) 0 0 calc(var(--pip-offset-36) * -1);
    box-shadow: 
        var(--pip-offset-26) var(--pip-offset-26) var(--pip-color),
        var(--pip-offset-52) var(--pip-offset-52) var(--pip-color),
        var(--pip-offset-52) 0 var(--pip-color),
        0 var(--pip-offset-52) var(--pip-color);
}

/* Face 6 */
.back::after {
    margin: calc(var(--pip-offset-35) * -1) 0 0 calc(var(--pip-offset-30) * -1);
    box-shadow: 
        var(--pip-offset-40) 0 var(--pip-color),
        0 var(--pip-offset-25) var(--pip-color),
        var(--pip-offset-40) var(--pip-offset-25) var(--pip-color),
        0 var(--pip-offset-50) var(--pip-color),
        var(--pip-offset-40) var(--pip-offset-50) var(--pip-color);
}

/* ============================================
   Text Content
   ============================================ */

.result,
.motion-hint {
    color: var(--text-color);
    font-family: var(--font-family);
    text-align: center;
    transition: color var(--transition-normal);
}

.result {
    font-weight: 600;
    font-size: var(--result-font-size);
}

.motion-hint {
    font-weight: 500;
    font-size: 14px;
    max-width: 320px;
}

/* ============================================
   Theme Switcher
   ============================================ */

.theme-switcher {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    gap: 8px;
    padding: 8px;
    background: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
}

.theme-button {
    padding: 10px 16px;
    background: transparent;
    color: var(--button-text);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    font-family: var(--font-family);
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-button:hover {
    background: rgba(0, 0, 0, 0.05);
}

.theme-button.active {
    background: rgba(0, 0, 0, 0.08);
    font-weight: 600;
}

[data-theme="dark"] .theme-button:hover {
    background: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .theme-button.active {
    background: rgba(255, 255, 255, 0.15);
}

/* ============================================
   Accessibility: Reduced Motion
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }
}

/* ============================================
   Responsive Design: Tablet
   ============================================ */

@media (min-width: 600px) {
    :root {
        --dice-size: 150px;
        --roll-padding-block: 14px;
        --roll-padding-inline: 32px;
        --roll-margin-top: 36px;
        --result-font-size: 18px;
        --pip-scale: 1.36;
    }
}

/* ============================================
   Responsive Design: Desktop
   ============================================ */

@media (min-width: 992px) {
    :root {
        --dice-size: 200px;
        --container-gap: 80px;
        --roll-padding-block: 16px;
        --roll-padding-inline: 40px;
        --roll-margin-top: 40px;
        --result-font-size: 22px;
        --pip-scale: 1.82;
    }
}