:root {
    /* Swiss Train Clock Colors */
    --clock-bg-light: #FFFFFF;
    --clock-bg-dark: #000000;
    --marker-light: #000000;
    --marker-dark: #E0E0E0;
    --hand-light: #000000;
    --hand-dark: #E0E0E0;
    --second-hand-red: #EB0000;
    
    /* Clock Dimensions */
    --clock-size: 1040px;
    --hour-mark-width: 24px;
    --hour-mark-height: 60px;
    --minute-mark-width: 3px;
    --minute-mark-height: 20px;
    /* Hour Hand Dimensions */
    --hour-hand-forward-length: 320px;    /* Forward from center - almost 3/4 to indicators */
    --hour-hand-backward-length: 60px;    /* Backward from center */
    --hour-hand-tip-taper: 20px;          /* Taper at tip */
    --hour-hand-width: 50px;              /* Base width */
    --hour-hand-tip-width: 30px;          /* Width at tip after taper */
    
    /* Minute Hand Dimensions */
    --minute-hand-forward-length: 425px;  /* Forward from center - stops at indicators */
    --minute-hand-backward-length: 80px;
    --minute-hand-tip-taper: 25px;
    --minute-hand-width: 40px;
    --minute-hand-tip-width: 24px;
    
    /* Second Hand Dimensions */
    --second-hand-forward-length: 375px;
    --second-hand-backward-length: 70px;
    --second-hand-width: 8px;
    --second-hand-circle-size: 52px;
    
    /* Shadow variables */
    --hand-shadow-offset-x: 2px;
    --hand-shadow-offset-y: 2px;
    --hand-shadow-blur: 4px;
    --hand-shadow-spread: 1px;
    --hand-shadow-color-light: rgba(0, 0, 0, 0.15);
    --hand-shadow-color-dark: rgba(255, 255, 255, 0.1);
    
    --center-dot-size: 16px;
    --center-ring-size: 22px;
}

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background: var(--clock-bg-light);
    transition: background-color 0.3s ease;
}

body[data-theme="dark"] {
    background: var(--clock-bg-dark);
}

/* Page Container */
.page-container {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 80px 20px 80px 20px; /* Space for theme toggle at bottom */
}

/* Clock Container */
.clock-container {
    position: relative;
    width: var(--clock-size);
    height: var(--clock-size);
    transform: scale(min((100vw - 40px) / var(--clock-size), (100vh - 160px) / var(--clock-size), 1));
    transform-origin: center center;
}

.clock {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

/* Minute Markers Container */
.minute-marks-container {
    position: absolute;
    width: calc(var(--clock-size) * 0.83);
    height: calc(var(--clock-size) * 0.83);
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.minute-mark {
    position: absolute;
    width: var(--minute-mark-width);
    height: var(--minute-mark-height);
    left: 50%;
    top: 4px;
    margin-left: calc(var(--minute-mark-width) / -2);
    border-radius: 1.5px;
    background-color: var(--marker-light);
    transform-origin: 50% calc(var(--clock-size) * 0.415 - 4px);
}

body[data-theme="dark"] .minute-mark {
    background-color: var(--marker-dark);
}

/* Hour Markers Container */
.hour-marks-container {
    position: absolute;
    width: calc(var(--clock-size) * 0.83);
    height: calc(var(--clock-size) * 0.83);
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hour-mark {
    position: absolute;
    width: var(--hour-mark-width);
    height: var(--hour-mark-height);
    left: 50%;
    top: 0;
    margin-left: calc(var(--hour-mark-width) / -2);
    border-radius: 2px;
    background-color: var(--marker-light);
    transform-origin: 50% calc(var(--clock-size) * 0.415);
}

body[data-theme="dark"] .hour-mark {
    background-color: var(--marker-dark);
}

/* Hands Container */
.hands-container {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
}

/* Hour Hand */
.hour-hand {
    position: absolute;
    left: 50%;
    top: calc(50% - var(--hour-hand-backward-length));
    width: var(--hour-hand-width);
    height: calc(var(--hour-hand-forward-length) + var(--hour-hand-backward-length));
    margin-left: calc(var(--hour-hand-width) / -2);
    background-color: var(--hand-light);
    transform-origin: 50% calc(var(--hour-hand-backward-length) / (var(--hour-hand-forward-length) + var(--hour-hand-backward-length)) * 100%);
    will-change: transform;
    box-shadow: var(--hand-shadow-offset-x) var(--hand-shadow-offset-y) var(--hand-shadow-blur) var(--hand-shadow-spread) var(--hand-shadow-color-light);
    border-radius: 0;
    z-index: 1;
}

body[data-theme="dark"] .hour-hand {
    background-color: var(--hand-dark);
    box-shadow: var(--hand-shadow-offset-x) var(--hand-shadow-offset-y) var(--hand-shadow-blur) var(--hand-shadow-spread) var(--hand-shadow-color-dark);
}

/* Minute Hand */
.minute-hand {
    position: absolute;
    left: 50%;
    top: calc(50% - var(--minute-hand-backward-length));
    width: var(--minute-hand-width);
    height: calc(var(--minute-hand-forward-length) + var(--minute-hand-backward-length));
    margin-left: calc(var(--minute-hand-width) / -2);
    background-color: var(--hand-light);
    transform-origin: 50% calc(var(--minute-hand-backward-length) / (var(--minute-hand-forward-length) + var(--minute-hand-backward-length)) * 100%);
    will-change: transform;
    box-shadow: var(--hand-shadow-offset-x) var(--hand-shadow-offset-y) var(--hand-shadow-blur) var(--hand-shadow-spread) var(--hand-shadow-color-light);
    border-radius: 0;
    z-index: 2;
}

body[data-theme="dark"] .minute-hand {
    background-color: var(--hand-dark);
    box-shadow: var(--hand-shadow-offset-x) var(--hand-shadow-offset-y) var(--hand-shadow-blur) var(--hand-shadow-spread) var(--hand-shadow-color-dark);
}

/* Second Hand */
.second-hand {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    transform-origin: 50% 50%;
    will-change: transform;
    z-index: 3;
    filter: drop-shadow(2px 2px 3px rgba(0, 0, 0, 0.2));
}

.second-hand-line {
    position: absolute;
    width: var(--second-hand-width);
    height: calc(var(--second-hand-forward-length) - var(--second-hand-circle-size) / 2);
    left: 50%;
    top: 50%;
    margin-left: calc(var(--second-hand-width) / -2);
    margin-top: calc(var(--second-hand-forward-length) * -1 + var(--second-hand-circle-size) / 2);
    background-color: var(--second-hand-red);
    border-radius: 4px;
    transform-origin: 50% 100%;
}

.second-hand-counterweight {
    position: absolute;
    width: var(--second-hand-width);
    height: var(--second-hand-backward-length);
    left: 50%;
    top: 50%;
    margin-left: calc(var(--second-hand-width) / -2);
    margin-top: 0;
    background-color: var(--second-hand-red);
    border-radius: 4px;
    transform-origin: 50% 0%;
}

.second-hand-circle {
    position: absolute;
    width: var(--second-hand-circle-size);
    height: var(--second-hand-circle-size);
    left: 50%;
    top: 50%;
    margin-left: calc(var(--second-hand-circle-size) / -2);
    margin-top: calc(var(--second-hand-forward-length) * -1);
    background-color: var(--second-hand-red);
    border-radius: 50%;
}

/* Center Dot */
.center-dot {
    position: absolute;
    width: var(--center-dot-size);
    height: var(--center-dot-size);
    left: 50%;
    top: 50%;
    margin-left: calc(var(--center-dot-size) / -2);
    margin-top: calc(var(--center-dot-size) / -2);
    object-fit: contain;
    z-index: 5;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 32px;
    background: rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 4px;
    transition: background-color 0.3s ease;
}

.theme-toggle:hover {
    background: rgba(0, 0, 0, 0.15);
}

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

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

.theme-toggle-icon {
    width: 24px;
    height: 24px;
    background: #333;
    border-radius: 50%;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

body[data-theme="dark"] .theme-toggle-icon {
    background: #e0e0e0;
    transform: translateX(28px);
}