/* ===== UNIFIED BUTTON SYSTEM ===== */

/* Base Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 0.75rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Glassmorphism Effect */
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.1) 0%,
        rgba(255, 255, 255, 0.05) 100%
    );
    border-radius: var(--radius-md);
    z-index: -1;
}

/* Shine Effect on Hover */
.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: left 0.6s ease;
}

.btn:hover::after {
    left: 100%;
}

/* Primary Button */
.btn-primary {
    background: linear-gradient(
        135deg,
        rgba(var(--primary-glow), 0.15) 0%,
        rgba(var(--primary-glow), 0.1) 100%
    );
    color: rgb(var(--primary-glow));
    border: 1px solid rgba(var(--primary-glow), 0.3);
    box-shadow:
        0 4px 15px -3px rgba(var(--primary-glow), 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background: linear-gradient(
        135deg,
        rgba(var(--primary-glow), 0.2) 0%,
        rgba(var(--primary-glow), 0.15) 100%
    );
    border-color: rgba(var(--primary-glow), 0.4);
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px -5px rgba(var(--primary-glow), 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

/* Secondary Button */
.btn-secondary {
    background: linear-gradient(
        135deg,
        rgba(var(--text-muted), 0.1) 0%,
        rgba(var(--text-muted), 0.05) 100%
    );
    color: rgb(var(--text-secondary));
    border: 1px solid rgba(var(--border-light), 0.4);
    box-shadow:
        0 4px 15px -3px rgba(0, 0, 0, 0.05),
        inset 0 1px 1px rgba(255, 255, 255, 0.05);
}

.btn-secondary:hover {
    background: linear-gradient(
        135deg,
        rgba(var(--text-muted), 0.15) 0%,
        rgba(var(--text-muted), 0.1) 100%
    );
    border-color: rgba(var(--border-light), 0.6);
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px -5px rgba(0, 0, 0, 0.1),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

/* Success Button */
.btn-success {
    background: linear-gradient(
        135deg,
        rgba(var(--success-glow), 0.15) 0%,
        rgba(var(--success-glow), 0.1) 100%
    );
    color: rgb(var(--success-glow));
    border: 1px solid rgba(var(--success-glow), 0.3);
    box-shadow:
        0 4px 15px -3px rgba(var(--success-glow), 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.btn-success:hover {
    background: linear-gradient(
        135deg,
        rgba(var(--success-glow), 0.2) 0%,
        rgba(var(--success-glow), 0.15) 100%
    );
    border-color: rgba(var(--success-glow), 0.4);
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px -5px rgba(var(--success-glow), 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(
        135deg,
        rgba(var(--danger-glow), 0.15) 0%,
        rgba(var(--danger-glow), 0.1) 100%
    );
    color: rgb(var(--danger-glow));
    border: 1px solid rgba(var(--danger-glow), 0.3);
    box-shadow:
        0 4px 15px -3px rgba(var(--danger-glow), 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.btn-danger:hover {
    background: linear-gradient(
        135deg,
        rgba(var(--danger-glow), 0.2) 0%,
        rgba(var(--danger-glow), 0.15) 100%
    );
    border-color: rgba(var(--danger-glow), 0.4);
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px -5px rgba(var(--danger-glow), 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

/* Warning Button */
.btn-warning {
    background: linear-gradient(
        135deg,
        rgba(var(--warning-glow), 0.15) 0%,
        rgba(var(--warning-glow), 0.1) 100%
    );
    color: rgb(var(--warning-glow));
    border: 1px solid rgba(var(--warning-glow), 0.3);
    box-shadow:
        0 4px 15px -3px rgba(var(--warning-glow), 0.15),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

.btn-warning:hover {
    background: linear-gradient(
        135deg,
        rgba(var(--warning-glow), 0.2) 0%,
        rgba(var(--warning-glow), 0.15) 100%
    );
    border-color: rgba(var(--warning-glow), 0.4);
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px -5px rgba(var(--warning-glow), 0.25),
        inset 0 1px 1px rgba(255, 255, 255, 0.2);
}

/* Ghost Button (Minimal) */
.btn-ghost {
    background: transparent;
    color: rgb(var(--text-secondary));
    border: 1px solid transparent;
    padding: 0.5rem 1rem;
}

.btn-ghost:hover {
    background: rgba(var(--text-muted), 0.1);
    border-color: rgba(var(--border-light), 0.3);
    transform: translateY(-1px);
}

/* Like Button */
.btn-like {
    background: linear-gradient(
        135deg,
        rgba(var(--text-muted), 0.1) 0%,
        rgba(var(--text-muted), 0.05) 100%
    );
    color: rgb(var(--text-secondary));
    border: 1px solid rgba(var(--border-light), 0.4);
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

.btn-like.liked {
    background: linear-gradient(
        135deg,
        rgba(var(--danger-glow), 0.15) 0%,
        rgba(var(--danger-glow), 0.1) 100%
    );
    color: rgb(var(--danger-glow));
    border-color: rgba(var(--danger-glow), 0.4);
}

.btn-like:hover {
    transform: translateY(-2px);
    box-shadow:
        0 8px 25px -5px rgba(var(--danger-glow), 0.2),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
}

/* Small Button */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    gap: 0.375rem;
}

/* Large Button */
.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
    gap: 0.75rem;
}

/* Full Width Button */
.btn-block {
    width: 100%;
    justify-content: center;
}

/* Disabled State */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

/* Icon Only Button */
.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    justify-content: center;
}

.btn-icon.btn-sm {
    width: 2rem;
    height: 2rem;
}

.btn-icon.btn-lg {
    width: 3rem;
    height: 3rem;
}

/* ===== THEME SUPPORT ===== */

/* Light Theme Enhancements */
@media (prefers-color-scheme: light) {
    .btn {
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

    .btn::before {
        background: linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.3) 0%,
            rgba(255, 255, 255, 0.2) 100%
        );
    }

    .btn-primary {
        box-shadow:
            0 4px 15px -3px rgba(var(--primary-glow), 0.2),
            inset 0 1px 1px rgba(255, 255, 255, 0.3);
    }

    .btn-secondary {
        box-shadow:
            0 4px 15px -3px rgba(0, 0, 0, 0.1),
            inset 0 1px 1px rgba(255, 255, 255, 0.3);
    }
}

/* Dark Theme Enhancements */
@media (prefers-color-scheme: dark) {
    .btn {
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
    }

    .btn::before {
        background: linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.08) 0%,
            rgba(255, 255, 255, 0.03) 100%
        );
    }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .btn {
        padding: 0.675rem 1.25rem;
        font-size: 0.85rem;
    }

    .btn-sm {
        padding: 0.45rem 0.875rem;
        font-size: 0.75rem;
    }

    .btn-lg {
        padding: 0.875rem 1.75rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
        justify-content: center;
    }

    .btn-group {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Button Group */
.btn-group {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.btn-group .btn {
    flex: 1;
}