/* Theme Variables */
:root {
    /* Dark Theme (Default) */
    --bg-color: #0a0a0a;
    --surface-color: #161616;
    --card-color: #1a1a1a;
    --text-color: #ffffff;
    --text-secondary: #b0b0b0;
    --primary-color: #971313;
    --primary-light: #c22e2e;
    --primary-dark: #6b0d0d;
    --accent-color: #ff4757;
    --border-color: #333333;
    --shadow-color: rgba(151, 19, 19, 0.3);
    --gradient-bg: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
}

.light-theme {
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --card-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --primary-color: #d32f2f;
    --primary-light: #ff6659;
    --primary-dark: #9a0007;
    --accent-color: #ff4757;
    --border-color: #e0e0e0;
    --shadow-color: rgba(211, 47, 47, 0.2);
    --gradient-bg: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

/* Theme Toggle Switch */
.theme-toggle {
    position: fixed;
    top: 25px;
    right: 25px;
    z-index: 1000;
    background: var(--surface-color);
    border-radius: var(--radius-full);
    padding: 5px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.theme-switch {
    display: none;
}

.theme-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    width: 60px;
    height: 30px;
    background: var(--card-color);
    border-radius: var(--radius-full);
    padding: 5px;
    cursor: pointer;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 10px var(--shadow-color);
    transition: all var(--transition-base);
}

.theme-label:hover {
    border-color: var(--primary-light);
}

.theme-label i {
    font-size: 14px;
    color: var(--primary-color);
    transition: all var(--transition-base);
    z-index: 1;
}

.theme-label .fa-sun {
    opacity: 1;
}

.theme-label .fa-moon {
    opacity: 0;
}

.theme-switch:checked + .theme-label .fa-sun {
    opacity: 0;
}

.theme-switch:checked + .theme-label .fa-moon {
    opacity: 1;
}

.theme-ball {
    position: absolute;
    width: 22px;
    height: 22px;
    background: var(--gradient-primary);
    border-radius: 50%;
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform: translateX(0);
    left: 3px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.theme-switch:checked + .theme-label .theme-ball {
    transform: translateX(30px);
}

/* Theme Transition */
body * {
    transition: background-color var(--transition-base),
                color var(--transition-base),
                border-color var(--transition-base),
                box-shadow var(--transition-base);
}

/* Theme-specific adjustments */
.light-theme .header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.light-theme .section-card {
    box-shadow: var(--shadow-md);
}

.light-theme .btn-primary {
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
}

.light-theme .btn-primary:hover {
    box-shadow: 0 6px 25px rgba(211, 47, 47, 0.4);
}