/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: 0 0% 0%;
    /* #000000 - NOIR */

    --primary-light: 25 100% 45%;
    /* #E67700 - Orange brûlé */

    --background: 40 22% 92%;
    /* #EDEBE6 - Sable chaud (plus foncé) */
    --background-gradient: linear-gradient(135deg, #EDEBE6 0%, #E0DCD3 50%, #D4CEC0 100%);
    /* Dégradé sable doré */
    --surface: 0 0% 100%;
    /* #FFFFFF - Blanc éclatant */
    --surface-variant: 40 30% 95%;
    /* #F5F2EB - Ivoire léger */

    --on-background: 210 30% 10%;
    /* #141A23 - NOIR PROFOND */
    --on-surface: 210 30% 10%;
    /* #141A23 - Texte ultra foncé */
    --on-surface-variant: 210 20% 30%;
    /* #3D4A5C - Gris anthracite */
    --on-primary: 0 0% 100%;
    /* Blanc sur orange */

    --border: 210 25% 70%;
    /* #94A3B8 - Bordures FONCÉES visibles */
    --border-light: 210 20% 80%;
    /* #C1CDD9 - Bordures claires */

    --success: 145 100% 38%;
    /* #00C77F - VERT ÉMERAUDE vif */
    --warning: 45 100% 50%;
    /* #FFCC00 - JAUNE D'OR éclatant */
    --error: 355 100% 52%;
    /* #FF2D55 - ROUGE FRAMBOISE */

    --shadow: 0 0% 0% / 0.14;
    /* Ombres marquées */
    --shadow-lg: 0 0% 0% / 0.25;

    /* STOCK COLORS - Violet VIVE */
    --stock-primary: 139 92 246;
    --stock-primary-light: 167 139 250;
    --stock-primary-dark: 109 40 217;
    --stock-success: 34 197 94;
    --stock-warning: 249 115 22;
    --stock-danger: 239 68 68;

    /* GLASSMORPHISM - Contraste maximal */
    --glass-bg: rgba(155, 135, 116, 0.274);
    /* Cards quasi opaques */
    --glass-bg-hover: rgba(168, 77, 16, 0.993);
    /* Opaque total */
    --glass-border: rgb(126, 80, 11);
    /* Bordures TRÈS visibles */
    --glass-border-hover: rgba(255, 174, 0, 0.6);
    /* Orange intense hover */
    --glass-shadow: 0 8px 24px rgba(243, 233, 226, 0.993);
    --glass-shadow-hover: 0 12px 32px rgba(255, 138, 0, 0.3);

    /* Accent turquoise vif */
    --accent: 174 100% 40%;
    /* Turquoise éclatante */

    /* ANIMATIONS */
    --hover-lift: translateY(-2px);
    --hover-scale: scale(1.02);
    --click-scale: scale(0.98);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

    /* Typography */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 50%;

    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: hsl(var(--on-background));
    background: var(--background-gradient);
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.full-width {
    width: 100%;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* Layout */
.container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* Splash Screen */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: hsl(var(--background));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.splash-content {
    text-align: center;
    max-width: 300px;
    padding: var(--space-6);
}

.logo-container {
    margin-bottom: var(--space-16);
}

.logo {
    width: 128px;
    height: 128px;
    border-radius: var(--radius-full);
    box-shadow: 0 8px 32px hsl(var(--shadow-lg));
}

.title-container {
    margin-bottom: var(--space-16);
}

.title-container h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: hsl(var(--primary));
    margin-bottom: var(--space-2);
}

.title-container p {
    font-size: var(--font-size-lg);
    color: hsl(var(--on-surface-variant));
}

.progress-container {
    width: 100%;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background-color: hsl(var(--surface));
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, hsl(var(--primary)), hsl(var(--primary-light)));
    border-radius: var(--radius);
    transition: width 0.1s ease-out;
    width: 0%;
}

.progress-text {
    font-size: var(--font-size-sm);
    color: hsl(var(--on-surface-variant));
    text-align: center;
}

/* Auth Screen */
.auth-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
}

.auth-card:hover {
    box-shadow: var(--glass-shadow-hover);
    border-color: var(--glass-border-hover);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-logo {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.auth-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: hsl(var(--primary));
}

.auth-form {
    space-y: var(--space-6);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: hsl(var(--on-surface));
    margin-bottom: var(--space-2);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-4) var(--space-4);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: hsl(var(--on-surface));
    font-size: var(--font-size-base);
    transition: var(--transition-smooth);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--glass-border-hover);
    background: var(--glass-bg-hover);
    box-shadow: 0 0 0 3px rgba(0, 255, 255, 0.1);
    transform: var(--hover-scale);
}

.form-group input::placeholder {
    color: hsl(var(--on-surface-variant));
}

.register-fields {
    transition: var(--transition-slow);
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    cursor: pointer;
    margin-bottom: 0 !important;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: var(--space-2);
    accent-color: hsl(var(--primary));
}

.auth-footer {
    margin-top: var(--space-6);
    text-align: center;
}

.auth-footer p {
    color: hsl(var(--on-surface-variant));
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-2);
}

/* NOUVEAUX BOUTONS GLASSMORPHISM */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    outline: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Bouton principal glassmorphism */
.btn-primary {
    background: linear-gradient(135deg, var(--glass-bg), var(--glass-bg-hover));
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: hsl(var(--primary));
    box-shadow: var(--glass-shadow);
    font-weight: 600;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--glass-bg-hover), rgba(0, 255, 255, 0.15));
    border-color: var(--glass-border-hover);
    transform: var(--hover-lift);
    box-shadow: var(--glass-shadow-hover);
    color: hsl(var(--primary-light));
}

.btn-primary:active:not(:disabled) {
    transform: var(--click-scale);
}

/* Bouton secondaire glassmorphism */
.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: hsl(var(--on-surface));
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    transform: var(--hover-lift);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-secondary:active:not(:disabled) {
    transform: var(--click-scale);
}

/* Bouton outline glassmorphism */
.btn-outline {
    background: transparent;
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    color: hsl(var(--on-surface));
}

.btn-outline:hover:not(:disabled) {
    background: var(--glass-bg);
    border-color: var(--glass-border-hover);
    transform: var(--hover-lift);
}

.btn-outline:active:not(:disabled) {
    transform: var(--click-scale);
}

.btn-link {
    background: none;
    border: none;
    color: hsl(var(--primary));
    text-decoration: underline;
    padding: 0;
    font-size: inherit;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-link:hover {
    color: hsl(var(--primary-light));
    transform: scale(1.05);
}

.btn-icon {
    padding: var(--space-3);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    color: hsl(var(--on-surface-variant));
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    color: hsl(var(--primary));
    transform: var(--hover-lift);
    box-shadow: var(--glass-shadow);
}

.btn-icon:active {
    transform: var(--click-scale);
}

.btn-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    color: hsl(var(--on-surface-variant));
    font-size: var(--font-size-xl);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.btn-close:hover {
    background: var(--glass-bg-hover);
    color: hsl(var(--error));
    transform: var(--hover-scale);
}

/* Loader */
.loader {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Main App Layout */
.main-app {
    min-height: 100vh;
    padding-bottom: 80px;
    /* Space for bottom nav */
}

.screen {
    min-height: calc(100vh - 80px);
    padding: var(--space-4);
}

.screen-header {
    padding: var(--space-6) 0 var(--space-4) 0;
    border-bottom: 1px solid hsl(var(--border));
    margin-bottom: var(--space-6);
}

.screen-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: hsl(var(--primary));
    text-align: center;
}

.screen-content {
    max-width: 400px;
    margin: 0 auto;
}

/* Cards glassmorphism */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-4);
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
}

.card:hover {
    border-color: var(--glass-border-hover);
    box-shadow: var(--glass-shadow-hover);
    transform: translateY(-1px);
}

.card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: hsl(var(--on-surface));
    margin-bottom: var(--space-4);
}

.card h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: hsl(var(--on-surface));
    margin-bottom: var(--space-3);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.card-header h3 {
    margin-bottom: 0;
}

/* Bottom Navigation glassmorphism */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: space-around;
    height: 80px;
    z-index: 1000;
    max-width: 400px;
    margin: 0 auto;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
    border: none;
    background: none;
    color: hsl(var(--on-surface-variant));
    cursor: pointer;
    transition: var(--transition-smooth);
    border-radius: var(--radius-lg);
    min-width: 44px;
    min-height: 44px;
}

.nav-item.active {
    color: hsl(var(--primary));
    background: var(--glass-bg-hover);
    transform: var(--hover-scale);
}

.nav-item:hover {
    color: hsl(var(--primary-light));
    background: var(--glass-bg);
    transform: var(--hover-scale);
}

.nav-item svg {
    margin-bottom: var(--space-1);
    transition: var(--transition-fast);
}

.nav-item.active svg {
    transform: scale(1.1);
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-2);
    }

    .auth-card {
        padding: var(--space-6);
    }

    .screen {
        padding: var(--space-2);
    }

    .card {
        padding: var(--space-4);
    }
}

/* Focus and Accessibility */
*:focus {
    outline: 2px solid hsl(var(--primary));
    outline-offset: 2px;
}

button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
    }

    to {
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}