/* Mobile-Perfect Foundation Layer */
/* Mobile-first base styles — target 0-639px (phones) */

/* === Design Tokens === */
:root {
    /* Spacing scale (rem-based) */
    --space-1: 0.25rem;  /* 4px */
    --space-2: 0.5rem;   /* 8px */
    --space-3: 0.75rem;  /* 12px */
    --space-4: 1rem;     /* 16px */
    --space-5: 1.5rem;   /* 24px */
    --space-6: 2rem;     /* 32px */
    --space-8: 3rem;     /* 48px */
    
    /* Typography scale */
    --text-xs: 0.75rem;   /* 12px */
    --text-sm: 0.875rem;  /* 14px */
    --text-base: 1rem;    /* 16px */
    --text-lg: 1.125rem;  /* 18px */
    --text-xl: 1.25rem;   /* 20px */
    --text-2xl: 1.5rem;   /* 24px */
    --text-3xl: 1.875rem; /* 30px */
    --text-4xl: 2.25rem;  /* 36px */
    
    /* Tap target minimum */
    --tap-target: 44px;
    
    /* Safe area insets (iOS notch) */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    
    /* Container padding */
    --container-padding: 1rem; /* 16px on mobile */
}

@media (min-width: 768px) {
    :root { --container-padding: 1.5rem; } /* 24px on tablet */
}

@media (min-width: 1024px) {
    :root { --container-padding: 2rem; } /* 32px on desktop */
}

/* === Base Reset === */
*, *::before, *::after {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-size: var(--text-base);
    line-height: 1.5;
    margin: 0;
    overflow-x: hidden;
    min-height: 100vh;
    min-height: 100dvh;
}

/* Prevent iOS zoom on input focus */
input, textarea, select {
    font-size: var(--text-base);
}

/* === Container === */
.m-container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* === Responsive Images === */
img, video, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

/* === Touch Target Utility === */
.touch-target {
    min-height: var(--tap-target);
    min-width: var(--tap-target);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* === Safe Area Padding === */
.safe-top { padding-top: var(--safe-top); }
.safe-bottom { padding-bottom: var(--safe-bottom); }
.safe-x { padding-left: env(safe-area-inset-left, 0px); padding-right: env(safe-area-inset-right, 0px); }

/* === Touch-Friendly Buttons === */
.btn-touch {
    min-height: var(--tap-target);
    min-width: var(--tap-target);
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
    line-height: 1.2;
    border: none;
    border-radius: var(--r-md, 0.5rem);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: transform 0.1s ease, opacity 0.2s ease;
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

.btn-touch:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.btn-touch-sm {
    min-height: 36px;
    padding: 0.5rem 1rem;
    font-size: var(--text-sm);
}

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

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

/* === Mobile-Friendly Form Inputs === */
.input-touch,
.input-touch[type="text"],
.input-touch[type="email"],
.input-touch[type="password"],
.input-touch[type="tel"],
.input-touch[type="url"],
.input-touch[type="search"],
.input-touch[type="number"],
textarea.input-touch,
select.input-touch {
    width: 100%;
    min-height: var(--tap-target);
    padding: 0.625rem 0.875rem;
    font-size: var(--text-base);
    line-height: 1.4;
    color: inherit;
    background: var(--card, #fff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: var(--r-md, 0.5rem);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.input-touch:focus {
    border-color: var(--primary, #10b981);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.input-touch:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

textarea.input-touch {
    min-height: 88px;
    resize: vertical;
    font-family: inherit;
}

.input-touch-error {
    border-color: var(--danger, #ef4444);
}

.input-touch-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.input-label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--fg, #18181b);
}

.input-hint {
    margin-top: 0.375rem;
    font-size: var(--text-xs);
    color: var(--fg-muted, #71717a);
}

.input-error {
    margin-top: 0.375rem;
    font-size: var(--text-xs);
    color: var(--danger, #ef4444);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* === Mobile Navbar === */
.mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--tap-target);
    height: var(--tap-target);
    padding: 0;
    background: transparent;
    border: 1px solid var(--border, #e4e4e7);
    border-radius: var(--r-md, 0.5rem);
    color: var(--fg, #18181b);
    cursor: pointer;
    touch-action: manipulation;
}

@media (min-width: 1024px) {
    .mobile-nav-toggle { display: none; }
}

.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 998;
    touch-action: none;
}

.mobile-nav-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    max-height: 85vh;
    background: var(--bg, #fff);
    border-bottom-left-radius: 1rem;
    border-bottom-right-radius: 1rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transform: translateY(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    padding: 0;
    padding-top: var(--safe-top);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

.mobile-nav-panel.open {
    transform: translateY(0);
}

.mobile-nav-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--container-padding);
    border-bottom: 1px solid var(--border, #e4e4e7);
}

.mobile-nav-logo {
    height: 28px;
    width: auto;
}

.mobile-nav-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--tap-target);
    height: var(--tap-target);
    padding: 0;
    background: transparent;
    border: 1px solid var(--border, #e4e4e7);
    border-radius: var(--r-md, 0.5rem);
    color: var(--fg, #18181b);
    cursor: pointer;
    touch-action: manipulation;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    padding: 0.5rem 0;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    min-height: var(--tap-target);
    padding: 0.75rem var(--container-padding);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--fg, #18181b);
    text-decoration: none;
    transition: background 0.15s ease;
}

.mobile-nav-link:active {
    background: var(--bg-muted, #f4f4f5);
}

.mobile-nav-link.active {
    color: var(--primary, #10b981);
}

.mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem var(--container-padding);
    border-top: 1px solid var(--border, #e4e4e7);
}

.mobile-nav-cta,
.mobile-nav-cta-secondary {
    width: 100%;
    justify-content: center;
}

.mobile-nav-cta {
    background: var(--primary, #10b981);
    color: #fff;
}

.mobile-nav-cta-secondary {
    background: transparent;
    color: var(--fg, #18181b);
    border: 1px solid var(--border, #e4e4e7);
}

/* === Hide/Show by Viewport === */
.desktop-only {
    display: none;
}

@media (min-width: 1024px) {
    .desktop-only {
        display: flex;
    }
}

.mobile-only {
    display: block;
}

@media (min-width: 1024px) {
    .mobile-only {
        display: none;
    }
}

/* === Mobile-Friendly Modals === */
.modal-touch {
    position: fixed;
    inset: 0;
    background: var(--bg, #fff);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

.modal-touch.open {
    transform: translateY(0);
}

@media (min-width: 768px) {
    .modal-touch {
        position: fixed;
        inset: auto;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) scale(0.95);
        max-width: 500px;
        width: calc(100% - 2rem);
        max-height: 85vh;
        border-radius: var(--r-lg, 1rem);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
        opacity: 0;
    }

    .modal-touch.open {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

.modal-touch-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 999;
}

.modal-touch-overlay.open {
    opacity: 1;
    visibility: visible;
}

.modal-touch-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--container-padding);
    border-bottom: 1px solid var(--border, #e4e4e7);
    flex-shrink: 0;
}

.modal-touch-title {
    margin: 0;
    font-size: var(--text-lg);
    font-weight: 700;
}

.modal-touch-body {
    flex: 1;
    overflow-y: auto;
    padding: var(--container-padding);
    -webkit-overflow-scrolling: touch;
}

.modal-touch-foot {
    display: flex;
    gap: 0.5rem;
    padding: 1rem var(--container-padding);
    border-top: 1px solid var(--border, #e4e4e7);
    flex-shrink: 0;
}

.modal-touch-foot .btn-touch {
    flex: 1;
}

/* === Mobile-Friendly Toasts & Alerts === */
.toast-touch {
    position: fixed;
    left: var(--container-padding);
    right: var(--container-padding);
    bottom: calc(1rem + var(--safe-bottom));
    background: var(--fg, #18181b);
    color: var(--bg, #fff);
    padding: 0.875rem 1rem;
    border-radius: var(--r-md, 0.5rem);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    z-index: 1100;
    transform: translateY(calc(100% + 1rem));
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: 400px;
    margin: 0 auto;
    font-size: var(--text-sm);
    touch-action: pan-y;
}

.toast-touch.open {
    transform: translateY(0);
}

@media (min-width: 768px) {
    .toast-touch {
        left: auto;
        right: 1.5rem;
        bottom: 1.5rem;
        max-width: 360px;
    }
}

.alert-touch {
    padding: 0.875rem 1rem;
    border-radius: var(--r-md, 0.5rem);
    border: 1px solid var(--border, #e4e4e7);
    background: var(--card, #fff);
    font-size: var(--text-sm);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.alert-touch-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--primary, #10b981);
    color: var(--fg, #18181b);
}

.alert-touch-error {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger, #ef4444);
    color: var(--fg, #18181b);
}

.alert-touch-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--warning, #f59e0b);
    color: var(--fg, #18181b);
}

/* === Mobile-Friendly Tables === */
.table-touch-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--r-md, 0.5rem);
    border: 1px solid var(--border, #e4e4e7);
}

.table-touch {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.table-touch th,
.table-touch td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border, #e4e4e7);
    white-space: nowrap;
}

.table-touch th {
    background: var(--bg-muted, #f4f4f5);
    font-weight: 600;
    color: var(--fg, #18181b);
    position: sticky;
    top: 0;
    z-index: 1;
}

.table-touch tbody tr:last-child td {
    border-bottom: none;
}

.table-touch tbody tr {
    transition: background 0.15s ease;
}

.table-touch tbody tr:active {
    background: var(--bg-muted, #f4f4f5);
}

/* === Mobile-Friendly Cards === */
.card-touch {
    background: var(--card, #fff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: var(--r-lg, 1rem);
    padding: 1.25rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.card-touch-clickable {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    -webkit-user-select: none;
    user-select: none;
}

.card-touch-clickable:active {
    transform: scale(0.98);
}

@media (min-width: 768px) {
    .card-touch-clickable:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }
}

.card-touch-title {
    margin: 0;
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--fg, #18181b);
}

.card-touch-body {
    font-size: var(--text-sm);
    color: var(--fg-muted, #71717a);
    line-height: 1.5;
}

.card-touch-foot {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 0.5rem;
}

/* === Dashboard Mobile Bottom Nav === */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg, #fff);
    border-top: 1px solid var(--border, #e4e4e7);
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    padding-bottom: var(--safe-bottom);
    z-index: 50;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
}

@media (min-width: 1024px) {
    .mobile-bottom-nav { display: none; }
}

.mobile-bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    min-height: var(--tap-target);
    padding: 0.5rem;
    color: var(--fg-muted, #71717a);
    text-decoration: none;
    font-size: var(--text-xs);
    font-weight: 500;
    background: transparent;
    border: none;
    cursor: pointer;
    touch-action: manipulation;
    transition: color 0.15s ease;
}

.mobile-bottom-nav-item i {
    font-size: 1.125rem;
}

.mobile-bottom-nav-item.active {
    color: var(--primary, #10b981);
}

.mobile-bottom-nav-item:active {
    opacity: 0.7;
}

body.has-bottom-nav {
    padding-bottom: calc(64px + var(--safe-bottom));
}

@media (min-width: 1024px) {
    body.has-bottom-nav {
        padding-bottom: 0;
    }
}

/* === Dashboard Mobile Drawer === */
.mobile-drawer-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 998;
    touch-action: none;
}

.mobile-drawer-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 85%;
    max-width: 320px;
    background: var(--bg, #fff);
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.15);
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    display: flex;
    flex-direction: column;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

.mobile-drawer.open {
    transform: translateX(0);
}

@media (min-width: 1024px) {
    .mobile-drawer { display: none; }
    .mobile-drawer-overlay { display: none; }
}

.mobile-drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border, #e4e4e7);
    flex-shrink: 0;
}

.mobile-drawer-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.mobile-drawer-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary, #10b981);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    overflow: hidden;
    flex-shrink: 0;
}

.mobile-drawer-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mobile-drawer-user-info {
    min-width: 0;
    flex: 1;
}

.mobile-drawer-user-name {
    font-weight: 700;
    font-size: var(--text-sm);
    color: var(--fg, #18181b);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-drawer-user-plan {
    font-size: var(--text-xs);
    color: var(--fg-muted, #71717a);
}

.mobile-drawer-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--tap-target);
    height: var(--tap-target);
    padding: 0;
    background: transparent;
    border: 1px solid var(--border, #e4e4e7);
    border-radius: var(--r-md, 0.5rem);
    color: var(--fg, #18181b);
    cursor: pointer;
    flex-shrink: 0;
    touch-action: manipulation;
}

.mobile-drawer-nav {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

.mobile-drawer-section {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border, #e4e4e7);
}

.mobile-drawer-section:last-child {
    border-bottom: none;
}

.mobile-drawer-section-title {
    padding: 0.5rem 1rem;
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--fg-muted, #71717a);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mobile-drawer-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: var(--tap-target);
    padding: 0.625rem 1rem;
    color: var(--fg, #18181b);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    touch-action: manipulation;
    transition: background 0.15s ease;
}

.mobile-drawer-item i {
    width: 20px;
    text-align: center;
    color: var(--fg-muted, #71717a);
}

.mobile-drawer-item.active {
    background: var(--primary-soft, rgba(16, 185, 129, 0.12));
    color: var(--primary, #10b981);
}

.mobile-drawer-item.active i {
    color: var(--primary, #10b981);
}

.mobile-drawer-item:active {
    background: var(--bg-muted, #f4f4f5);
}

.mobile-drawer-logout {
    color: var(--danger, #ef4444);
}

.mobile-drawer-logout i {
    color: var(--danger, #ef4444);
}