/*
 * Button Components - Modern with hover effects
 */

/* Base Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 600;
    line-height: 1;
    text-align: center;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Ripple Effect */
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

/* Primary Button - OPPO Green */
.btn-primary {
    background: var(--oppo-green, #1FAD5B);
    color: var(--color-white, white);
    box-shadow: 0 4px 15px rgba(31, 173, 91, 0.3);
    border: 2px solid var(--oppo-green, #1FAD5B);
}

.btn-primary:hover {
    background: var(--color-white, white);
    color: var(--oppo-green, #1FAD5B);
    border-color: var(--oppo-green, #1FAD5B);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(31, 173, 91, 0.25);
}

/* Secondary Button - OPPO White/Outline */
.btn-secondary {
    background: rgba(255,255,255,0.15);
    color: var(--color-white);
    border: 2px solid rgba(255,255,255,0.8);
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    background: var(--color-white);
    color: var(--oppo-green);
    border-color: var(--color-white);
    transform: translateY(-2px);
}

/* Accent Button - OPPO Green dark */
.btn-accent {
    background: #0E8C48;
    color: var(--color-white);
    border: 2px solid #0E8C48;
    box-shadow: none;
}

.btn-accent:hover {
    background: var(--color-white);
    color: var(--oppo-green);
    border-color: var(--oppo-green);
    transform: translateY(-1px);
}

/* Hero Button - OPPO Green Large */
.btn-hero {
    background: var(--oppo-green);
    color: var(--color-white);
    border: 2px solid var(--oppo-green);
    box-shadow: 0 4px 20px rgba(31, 173, 91, 0.4);
    font-size: var(--text-lg);
    padding: var(--space-lg) var(--space-2xl);
}

.btn-hero:hover {
    background: var(--color-white);
    color: var(--oppo-green);
    border-color: var(--oppo-green);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(31, 173, 91, 0.25);
}

/* Glow Button - OPPO Green con glow */
.btn-glow {
    background: var(--oppo-green);
    color: var(--color-white);
    border: 2px solid var(--oppo-green);
    box-shadow: 0 0 20px rgba(31, 173, 91, 0.5);
    animation: oppo-glow 2s ease-in-out infinite alternate;
}

.btn-glow:hover {
    background: var(--color-white);
    color: var(--oppo-green);
    border-color: var(--oppo-green);
    transform: translateY(-1px);
    box-shadow: 0 0 20px rgba(31, 173, 91, 0.3);
    animation: none;
}

@keyframes oppo-glow {
    from { box-shadow: 0 0 15px rgba(31, 173, 91, 0.4); }
    to   { box-shadow: 0 0 28px rgba(31, 173, 91, 0.7); }
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--oppo-green);
    border: 2px solid var(--oppo-green);
}

.btn-outline:hover {
    background: var(--oppo-green);
    color: var(--color-white);
    border-color: var(--oppo-green);
    transform: translateY(-1px);
}

/* Icon Button */
.btn-icon {
    padding: var(--space-md);
    border-radius: 50%;
    width: 48px;
    height: 48px;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--text-lg);
}

.btn-xl {
    padding: var(--space-xl) var(--space-3xl);
    font-size: var(--text-xl);
}

/* Button with Icon */
.btn .icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-fast);
}

.btn:hover .icon {
    transform: translateX(4px);
}

/* Loading State */
.btn-loading {
    pointer-events: none;
    position: relative;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* Button Group */
.btn-group {
    display: inline-flex;
    gap: var(--space-sm);
}

.btn-group .btn {
    border-radius: var(--radius-md);
}

.btn-group .btn:first-child {
    border-top-left-radius: var(--radius-full);
    border-bottom-left-radius: var(--radius-full);
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--radius-full);
    border-bottom-right-radius: var(--radius-full);
}

/* Responsive */
@media (max-width: 768px) {
    .btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: var(--text-sm);
        min-height: 48px;
        min-width: 48px;
    }

    .btn-hero {
        padding: var(--space-md) var(--space-xl);
        font-size: var(--text-base);
        min-height: 52px;
    }

    .btn-icon {
        width: 48px;
        height: 48px;
        min-width: 48px;
    }

    .btn-group {
        flex-direction: column;
        width: 100%;
        gap: var(--space-md);
    }

    .btn-group .btn {
        width: 100%;
        border-radius: var(--radius-full);
    }
}

/* Android-specific touch targets - Honor, Pixel, Xiaomi, OnePlus */
@media (max-width: 768px) and (min-width: 360px) {
    a, button, input[type="submit"], input[type="button"] {
        min-height: 48px;
        padding: var(--space-sm) var(--space-md);
    }

    .navbar-nav-link {
        padding: var(--space-md) var(--space-lg);
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .booking-time-slot {
        min-height: 48px;
        min-width: 70px;
    }
}