/**
 * =====================================================
 * BUTTON SYSTEM - Gli Amici di Colombo Design System
 * =====================================================
 * 
 * A comprehensive button system with multiple variants,
 * sizes, and states for consistent UI across the website.
 */

/* ===================================================
   BASE BUTTON STYLES
   =================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--btn-font-weight);
    line-height: 1;
    text-decoration: none;
    border-radius: var(--btn-radius);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn:focus {
    outline: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

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

/* Icon in button */
.btn i,
.btn svg {
    font-size: 1.1em;
    flex-shrink: 0;
}

/* ===================================================
   PRIMARY BUTTON (Gold Gradient)
   =================================================== */

.btn-primary {
    background: var(--gradient-accent-warm);
    color: var(--color-primary-dark);
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(212, 168, 83, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 168, 83, 0.4);
    filter: brightness(1.05);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(212, 168, 83, 0.3);
}

/* Ripple effect on primary button */
.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.btn-primary:active::after {
    width: 200%;
    height: 200%;
}

/* ===================================================
   SECONDARY BUTTON (Navy Outline)
   =================================================== */

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* ===================================================
   ACCENT BUTTON (Gold Outline)
   =================================================== */

.btn-accent {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-accent:hover {
    background: var(--gradient-accent);
    color: var(--color-primary-dark);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

.btn-accent:active {
    transform: translateY(0);
}

/* ===================================================
   TERTIARY BUTTON (Text Link Style)
   =================================================== */

.btn-tertiary {
    background: transparent;
    color: var(--color-primary);
    border-color: transparent;
    padding-left: var(--space-2);
    padding-right: var(--space-2);
    position: relative;
}

.btn-tertiary::before {
    content: '';
    position: absolute;
    bottom: 6px;
    left: var(--space-2);
    right: var(--space-2);
    height: 2px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--duration-normal) var(--ease-out);
}

.btn-tertiary:hover {
    color: var(--color-accent);
}

.btn-tertiary:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

/* ===================================================
   WHITE BUTTON (For dark backgrounds)
   =================================================== */

.btn-white {
    background: var(--bg-primary);
    color: var(--color-primary);
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: var(--bg-cream);
}

.btn-white:active {
    transform: translateY(0);
}

/* ===================================================
   GHOST BUTTON (For dark backgrounds)
   =================================================== */

.btn-ghost {
    background: transparent;
    color: var(--text-inverse);
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
    color: var(--text-inverse);
}

.btn-ghost:active {
    background: rgba(255, 255, 255, 0.15);
}

/* ===================================================
   BUTTON SIZES
   =================================================== */

.btn-sm {
    padding: var(--btn-padding-y-sm) var(--btn-padding-x-sm);
    font-size: var(--text-sm);
    gap: var(--space-1);
}

.btn-lg {
    padding: var(--btn-padding-y-lg) var(--btn-padding-x-lg);
    font-size: var(--text-lg);
    gap: var(--space-3);
}

/* ===================================================
   BUTTON SHAPES
   =================================================== */

.btn-square {
    border-radius: var(--radius-default);
}

.btn-rounded {
    border-radius: var(--radius-lg);
}

/* ===================================================
   FULL WIDTH BUTTON
   =================================================== */

.btn-block {
    width: 100%;
}

/* ===================================================
   ICON-ONLY BUTTON
   =================================================== */

.btn-icon {
    padding: var(--space-3);
    width: 48px;
    height: 48px;
}

.btn-icon.btn-sm {
    padding: var(--space-2);
    width: 36px;
    height: 36px;
}

.btn-icon.btn-lg {
    padding: var(--space-4);
    width: 56px;
    height: 56px;
}

/* ===================================================
   BUTTON WITH LOADING STATE
   =================================================== */

.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-secondary.btn-loading::after,
.btn-accent.btn-loading::after {
    border-color: rgba(30, 58, 95, 0.3);
    border-top-color: var(--color-primary);
}

/* ===================================================
   BUTTON GROUP
   =================================================== */

.btn-group {
    display: inline-flex;
    gap: 0;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: var(--btn-radius) 0 0 var(--btn-radius);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--btn-radius) var(--btn-radius) 0;
}

.btn-group .btn:not(:last-child) {
    border-right-width: 1px;
}

/* ===================================================
   CTA BUTTONS (Hero Section Style)
   =================================================== */

.cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: 1rem 2.5rem;
    font-family: var(--font-body);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    text-decoration: none;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.cta-btn-primary {
    background: var(--gradient-accent-warm);
    color: var(--color-primary-dark);
    box-shadow: 0 8px 24px rgba(212, 168, 83, 0.35);
}

.cta-btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 32px rgba(212, 168, 83, 0.45);
}

.cta-btn-secondary {
    /* REMOVE backdrop-filter - causes iOS rendering issues */
    background: rgba(255, 255, 255, 0.25) !important; /* Solid semi-transparent background - no blur */
    color: white !important; /* Explicit white color */
    border: 2px solid rgba(255, 255, 255, 0.8) !important; /* Strong visible border */
    /* iOS Safari compatibility */
    -webkit-appearance: none !important;
    appearance: none !important;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0.3);
    /* Force text rendering */
    text-rendering: optimizeLegibility;
    /* Ensure button is clickable and visible */
    cursor: pointer;
    opacity: 1 !important;
}

.cta-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.35) !important;
    border-color: rgba(255, 255, 255, 1) !important;
    color: white !important;
    transform: translateY(-2px);
}

/* iOS Safari specific fixes - stronger backgrounds */
@supports (-webkit-touch-callout: none) {
    .cta-btn-secondary {
        background: rgba(255, 255, 255, 0.3) !important; /* Even stronger for iOS */
        border: 2px solid rgba(255, 255, 255, 0.9) !important;
        color: #ffffff !important; /* Explicit white text */
        /* Remove any blur on iOS */
        -webkit-backdrop-filter: none !important;
        backdrop-filter: none !important;
        -webkit-font-smoothing: antialiased;
        text-rendering: optimizeLegibility;
        opacity: 1 !important;
    }
}

/* Event CTA Button (Gold style) */
.cta-btn-event {
    background: var(--gradient-accent-warm);
    color: var(--color-primary-dark);
    border: 2px solid rgba(255, 215, 0, 0.6);
    flex-direction: column;
    gap: var(--space-2);
    padding: 1rem 1.5rem;
    text-align: center;
    min-width: 200px;
}

.cta-btn-event:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.4);
    border-color: rgba(255, 215, 0, 0.9);
}

.cta-btn-event .event-name {
    font-weight: var(--font-semibold);
    line-height: 1.3;
}

.cta-btn-event .event-date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    background: rgba(0, 0, 0, 0.12);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
}

/* ===================================================
   RESPONSIVE ADJUSTMENTS
   =================================================== */

@media (max-width: 768px) {
    .btn {
        padding: var(--space-3) var(--space-5);
    }
    
    .btn-lg {
        padding: var(--space-4) var(--space-6);
    }
    
    .cta-btn {
        padding: 0.875rem 2rem;
        font-size: var(--text-base);
    }
    
    .btn-mobile-full {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .cta-btn {
        padding: 0.75rem 1.5rem;
        font-size: var(--text-sm);
    }
}

/* ===================================================
   ACCESSIBILITY
   =================================================== */

@media (prefers-reduced-motion: reduce) {
    .btn,
    .cta-btn {
        transition: none;
    }
    
    .btn:hover,
    .cta-btn:hover {
        transform: none;
    }
    
    .btn-primary::after {
        display: none;
    }
}