/* Button System - Comprehensive button styles following design system */

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

.btn {
    font-family: 'Lexend', sans-serif;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.5;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.5rem;
    border: 1px solid transparent;
    border-radius: 0.5rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    white-space: nowrap;
    user-select: none;
}

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

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

/* ==================== PRIMARY BUTTON ==================== */

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
}

.btn-primary:active:not(:disabled) {
    background-color: #6B2402;
    border-color: #6B2402;
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(180, 60, 4, 0.2);
}

.btn-primary:disabled,
.btn-primary.disabled {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
    opacity: 1;
}

/* ==================== SECONDARY BUTTON ==================== */

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.btn-secondary:active:not(:disabled) {
    background-color: #B85810;
    border-color: #B85810;
    transform: translateY(0);
}

/* ==================== OUTLINE BUTTON ==================== */

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

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
}

.btn-outline:active:not(:disabled) {
    background-color: #8B2F03;
    border-color: #8B2F03;
}

/* ==================== OUTLINE SECONDARY ==================== */

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

.btn-outline-secondary:hover:not(:disabled) {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
}

.btn-outline-secondary:active:not(:disabled) {
    background-color: #0F1220;
    border-color: #0F1220;
}

/* ==================== LIGHT BUTTON ==================== */

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

.btn-light:hover:not(:disabled) {
    background-color: #FFDDD7;
    border-color: #FFDDD7;
    color: var(--color-primary);
}

.btn-light:active:not(:disabled) {
    background-color: #FFCEC5;
    border-color: #FFCEC5;
}

/* ==================== TEXT BUTTON (Ghost) ==================== */

.btn-text {
    background-color: transparent;
    border-color: transparent;
    color: var(--color-primary);
    padding: 0.625rem 1rem;
}

.btn-text:hover:not(:disabled) {
    background-color: var(--color-light);
    color: var(--color-primary);
}

.btn-text:active:not(:disabled) {
    background-color: #FFDDD7;
}

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

/* Small Button */
.btn-sm {
    font-size: 14px;
    padding: 0.5rem 1rem;
    height: 36px;
}

/* Medium Button (Default) */
.btn-md {
    font-size: 15px;
    padding: 0.625rem 1.5rem;
    height: 42px;
}

/* Large Button */
.btn-lg {
    font-size: 16px;
    padding: 0.75rem 2rem;
    height: 48px;
}

/* Custom 48px variant for specific use cases */
.btn-lg-48 {
    height: 48px;
    padding: 0 1.5rem;
}

/* Extra Large Button */
.btn-xl {
    font-size: 18px;
    padding: 1rem 2.5rem;
    height: 56px;
}

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

.btn-block {
    width: 100%;
    display: flex;
}

/* ==================== ICON BUTTONS ==================== */

.btn-icon {
    padding: 0;
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
}

.btn-icon.btn-sm {
    width: 36px;
    height: 36px;
}

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

.btn-icon.btn-xl {
    width: 56px;
    height: 56px;
}

/* Round icon buttons */
.btn-icon-round {
    border-radius: 50%;
}

/* ==================== BUTTON WITH ICONS ==================== */

.btn svg,
.btn img,
.btn .oi {
    flex-shrink: 0;
}

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

.btn-sm svg {
    width: 16px;
    height: 16px;
}

.btn-lg svg,
.btn-xl svg {
    width: 24px;
    height: 24px;
}

/* ==================== BUTTON GROUPS ==================== */

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

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

.btn-group .btn:first-child {
    border-top-left-radius: 0.5rem;
    border-bottom-left-radius: 0.5rem;
}

.btn-group .btn:last-child {
    border-top-right-radius: 0.5rem;
    border-bottom-right-radius: 0.5rem;
}

.btn-group .btn:not(:last-child) {
    border-right: none;
}

/* ==================== LOADING STATE ==================== */

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

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    animation: btn-spinner 0.6s linear infinite;
    color: white;
}

.btn-outline.btn-loading::after,
.btn-text.btn-loading::after {
    color: var(--color-primary);
}

@keyframes btn-spinner {
    to {
        transform: rotate(360deg);
    }
}

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

/* Mobile (default) - Full width on small screens when needed */
@media (max-width: 768px) {
    .btn-mobile-block {
        width: 100%;
        display: flex;
    }

    .btn-group-mobile-vertical {
        flex-direction: column;
        width: 100%;
    }

    .btn-group-mobile-vertical .btn {
        border-radius: 0.5rem;
        border-right: 1px solid;
        border-bottom: none;
    }

    .btn-group-mobile-vertical .btn:not(:last-child) {
        border-bottom: none;
    }
}

/* ==================== SPECIAL BUTTON VARIANTS ==================== */

/* Navigation/Header Buttons - Match BMC button height */
.navbar .btn {
    height: 38px;
    padding: 7px 15px;
    font-size: 15px;
}

/* Buy Me a Coffee Button (existing style) */
.nav-btn img,
.bmc-btn img {
    height: 38px;
    width: auto;
    max-width: 100%;
}

.bmc-btn {
    height: 38px;
}

/* App Store Buttons - inherit from base */
.store-button {
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 0;
}

.store-button:hover {
    opacity: 0.8;
    transform: translateY(-2px);
}

.store-button img {
    max-width: 140px;
    height: auto;
}

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

/* Enhanced focus for keyboard navigation */
.btn:focus:not(:focus-visible) {
    outline: none;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }

    .btn:hover:not(:disabled) {
        transform: none;
    }

    .btn-loading::after {
        animation: none;
        border-top-color: currentColor;
    }
}