/* public/css/app.css */

/* Font Declarations */
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400; /* Regular weight is 400 */
    src: url('../fonts/inter/Inter_18pt-Regular.ttf') format('truetype');
    font-display: swap;
}
/* You would add other font weights here if you use them, e.g.:
@font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    src: url('../fonts/inter/Inter_18pt-Bold.ttf') format('truetype');
    font-display: swap;
}
*/

/* Reset & Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    /* Primary Brand Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --primary-dark: #1e40af;
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* Secondary Colors */
    --secondary-color: #059669;
    --secondary-hover: #047857;
    --secondary-light: #d1fae5;
    --secondary-dark: #065f46;
    --secondary-50: #ecfdf5;
    --secondary-100: #d1fae5;
    --secondary-500: #10b981;
    --secondary-600: #059669;
    --secondary-700: #047857;
    --secondary-800: #065f46;
    --secondary-900: #064e3b;

    /* Accent Colors */
    --accent-color: #ea580c;
    --accent-hover: #dc2626;
    --accent-light: #fed7aa;
    --accent-dark: #c2410c;
    --accent-50: #fff7ed;
    --accent-100: #ffedd5;
    --accent-500: #f97316;
    --accent-600: #ea580c;
    --accent-700: #c2410c;
    --accent-800: #9a3412;
    --accent-900: #7c2d12;

    /* Neutral/Gray Colors */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Status Colors */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --success-dark: #047857;

    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --warning-dark: #d97706;

    --danger-color: #ef4444;
    --danger-light: #fecaca;
    --danger-dark: #dc2626;

    --info-color: #3b82f6;
    --info-light: #dbeafe;
    --info-dark: #1d4ed8;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;

    /* Spacing & Borders */
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-2xl: 20px;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;
    --transition-all: all 0.2s ease;

    /* Z-index scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}


html {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--gray-700);
    background-color: var(--gray-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.main-content {
    flex: 1;
    padding: 2rem 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
}
h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
}
h3 {
    font-size: var(--font-size-2xl);
}
h4 {
    font-size: var(--font-size-xl);
}
h5 {
    font-size: var(--font-size-lg);
}
h6 {
    font-size: var(--font-size-base);
}

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-all);
}

a:hover {
    color: var(--primary-hover);
}

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

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    line-height: 1;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: var(--transition-all);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

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

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

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

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

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

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

.btn-outline-secondary {
    background-color: transparent;
    border-color: var(--gray-300);
    color: var(--gray-700);
}

.btn-outline-secondary:hover:not(:disabled) {
    background-color: var(--gray-100);
    border-color: var(--gray-400);
    color: var(--gray-800);
}

/* Button Sizes */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-sm);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius-lg);
}

.btn-xl {
    padding: 1.25rem 2.5rem;
    font-size: var(--font-size-xl);
    border-radius: var(--border-radius-lg);
}

/* Form Controls */
.form-control,
.form-select {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--gray-700);
    background-color: white;
    background-clip: padding-box;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    transition: var(--transition-all);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    outline: none;
}

.form-control::placeholder {
    color: var(--gray-400);
    opacity: 1;
}

.form-control:disabled {
    background-color: var(--gray-100);
    opacity: 1;
}

.form-label {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
    font-size: var(--font-size-sm);
}

.form-text {
    margin-top: 0.25rem;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

/* Input Groups */
.input-group {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: stretch;
    width: 100%;
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    color: var(--gray-600);
    text-align: center;
    background-color: var(--gray-100);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
}

.input-group > .form-control:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group > .form-control:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group > .input-group-text:not(:first-child) {
    border-left: 0;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group > .input-group-text:not(:last-child) {
    border-right: 0;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

/* Card Styles */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: white;
    background-clip: border-box;
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition-all);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    padding: 1.5rem;
    margin-bottom: 0;
    background-color: white;
    border-bottom: 2px solid var(--gray-100);
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--gray-900);
}

.card-body {
    flex: 1 1 auto;
    padding: 1.5rem;
}

.card-footer {
    padding: 1.5rem;
    background-color: var(--gray-50);
    border-top: 2px solid var(--gray-100);
    border-bottom-left-radius: var(--border-radius-lg);
    border-bottom-right-radius: var(--border-radius-lg);
}

/* Navigation Styles */
.navbar {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    background-color: white !important;
    box-shadow: var(--shadow);
    border-bottom: 1px solid var(--gray-200);
}

.navbar-brand {
    padding-top: 0.3125rem;
    padding-bottom: 0.3125rem;
    margin-right: 1rem;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    line-height: inherit;
    color: var(--primary-color) !important;
    text-decoration: none;
    white-space: nowrap;
    transition: var(--transition-all);
}

.navbar-brand:hover {
    color: var(--primary-hover) !important;
}

.nav-link {
    display: block;
    padding: 0.5rem 1rem;
    font-weight: var(--font-weight-medium);
    color: var(--gray-600) !important;
    text-decoration: none;
    transition: var(--transition-all);
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.nav-link:focus {
    color: var(--primary-color) !important;
}

/* Dropdown Styles */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-dropdown);
    display: none;
    min-width: 10rem;
    padding: 0.5rem 0;
    margin: 0.5rem 0 0;
    font-size: var(--font-size-base);
    color: var(--gray-700);
    text-align: left;
    background-color: white;
    background-clip: padding-box;
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    clear: both;
    font-weight: var(--font-weight-normal);
    color: var(--gray-700);
    text-align: inherit;
    text-decoration: none;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    transition: var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:focus {
    color: var(--primary-color);
    background-color: var(--primary-light);
}

.dropdown-item.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
    font-weight: var(--font-weight-medium);
}

/* Language Selector Styles */
.flag-icon {
    width: 20px;
    height: 15px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--gray-200);
}

.dropdown-item.active .flag-icon {
    border-color: var(--primary-color);
}

#languageDropdown {
    border-color: var(--gray-300);
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    padding: 0.5rem 1rem;
}

#languageDropdown:hover {
    background-color: var(--gray-100);
    border-color: var(--gray-400);
}

/* Calculator Specific Styles */
.calculator-container {
    background-color: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: var(--transition-all);
}

.calculator-container:hover {
    box-shadow: var(--shadow-xl);
}

.calculator-title {
    color: var(--gray-900);
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.5rem;
    font-size: var(--font-size-3xl);
}

.calculator-description {
    color: var(--gray-600);
    margin-bottom: 2rem;
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
}

.result-container {
    background: linear-gradient(135deg, var(--primary-50), var(--secondary-50));
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin-top: 1.5rem;
    text-align: center;
    animation: slideInUp 0.3s ease;
}

.result-value {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    line-height: var(--line-height-tight);
}

.result-label {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Ad Container Styles */
.ad-container {
    margin: 2rem 0;
    text-align: center;
}

.ad-container.sidebar-ad {
    position: sticky;
    top: 2rem;
}

.ad-placeholder {
    background-color: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius);
    padding: 2rem 1rem;
    color: var(--gray-500);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

/* Utility Classes */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-accent { color: var(--accent-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-info { color: var(--info-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--secondary-color) !important; }
.bg-accent { background-color: var(--accent-color) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-danger { background-color: var(--danger-color) !important; }
.bg-info { background-color: var(--info-color) !important; }

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-300);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

@keyframes slideInUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem 0;
    }

    .calculator-container {
        padding: 1.5rem 1rem;
        margin-bottom: 1rem;
    }

    .calculator-title {
        font-size: var(--font-size-2xl);
    }

    .calculator-description {
        font-size: var(--font-size-base);
    }

    .result-value {
        font-size: var(--font-size-3xl);
    }

    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }

    .btn-lg {
        width: 100%;
        padding: 1rem 1.5rem;
    }

    .card-body,
    .card-header {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .calculator-container {
        padding: 1rem 0.75rem;
    }

    .result-container {
        padding: 1.5rem 1rem;
    }

    .navbar {
        padding: 0.75rem 0;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Dark mode support (if needed later) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here */
}

/* Print styles */
@media print {
    .navbar,
    .ad-container,
    .btn {
        display: none !important;
    }

    .calculator-container {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }

    body {
        background-color: white;
    }
}