/* ==========================================================================
   Admitere Medicina - Web Platform Base Stylesheet
   ==========================================================================

   This stylesheet defines the base styles for the web platform.
   Built from the landing page design system for consistency.

   Sections:
   1. CSS Variables & Theme
   2. Reset & Base Styles
   3. Typography
   4. Layout & Spacing
   5. Colors & Backgrounds
   6. Responsive Breakpoints

   ========================================================================== */

/* ==========================================================================
   1. CSS Variables & Theme
   ========================================================================== */

:root {
    /* Colors - Primary (Landing Page) */
    --color-primary: #6369D0;
    --color-primary-dark: #4A50B8;
    --color-primary-light: #A8B5FB;

    /* Colors - Secondary (Landing Page) */
    --color-secondary: #FBC4E7;
    --color-secondary-dark: #E8A8D4;
    --color-secondary-light: #FDDBF0;

    /* Colors - Text (Landing Page) */
    --color-text-heading: #111111;
    --color-text-dark: #1a1a1a;
    --color-text-default: #374151;
    --color-text-muted: #6B7280;
    --color-text-hint: #9CA3AF;
    --color-text-light: #555555;
    --color-text-white: #ffffff;

    /* Colors - Background */
    --color-bg-white: #ffffff;
    --color-bg-light: #f4f9ff;
    --color-bg-dark: #232323;
    --color-bg-disabled: #f5f5f5;

    /* Colors - Borders */
    --color-border: #eaeaea;
    --color-border-light: #edf4f8;
    --color-border-dark: #ddd;

    /* Colors - Status */
    --color-success: #28a745;
    --color-error: #dc3545;
    --color-warning: #ffc107;
    --color-info: #17a2b8;

    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-weight-regular: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Font Sizes */
    --font-size-h1: 52px;
    --font-size-h2: 24px;
    --font-size-h3: 20px;
    --font-size-h4: 16px;
    --font-size-h5: 14px;
    --font-size-body: 17px;
    --font-size-small: 14px;
    --font-size-btn: 14px;

    /* Line Heights */
    --line-height-heading: 1.2;
    --line-height-body: 1.65;
    --line-height-tight: 1.4;

    /* Letter Spacing */
    --letter-spacing-heading-1: -3px;
    --letter-spacing-heading-2: -1.5px;
    --letter-spacing-body: -0.2px;

    /* Spacing Scale */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;
    --spacing-4xl: 48px;
    --spacing-5xl: 64px;

    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-default: all 0.3s ease;
    --transition-slow: all 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);

    /* Gradients */
    --gradient-primary: linear-gradient(-45deg, #e035a0 50%, #714ac7 100%);
    --gradient-primary-reverse: linear-gradient(-45deg, #714ac7 50%, #e035a0 100%);
}

/* Dark Mode Support - System Preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-text-heading: #f0f0f0;
        --color-text-dark: #e8e8e8;
        --color-text-default: #c0c0c0;
        --color-text-muted: #a0a0a0;
        --color-text-hint: #808080;
        --color-bg-white: #1a1a1a;
        --color-bg-light: #2a2a2a;
        --color-bg-disabled: #333333;
        --color-border: #404040;
        --color-border-light: #3a3a3a;
    }
}

/* Dark Mode Support - Explicit */
[data-theme="dark"] {
    --color-text-heading: #f0f0f0;
    --color-text-dark: #e8e8e8;
    --color-text-default: #c0c0c0;
    --color-text-muted: #a0a0a0;
    --color-text-hint: #808080;
    --color-bg-white: #1a1a1a;
    --color-bg-light: #2a2a2a;
    --color-bg-disabled: #333333;
    --color-border: #404040;
    --color-border-light: #3a3a3a;
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg-white);
    color: var(--color-text-default);
    font-family: var(--font-family);
    font-size: var(--font-size-body);
    line-height: var(--line-height-body);
    letter-spacing: var(--letter-spacing-body);
    font-weight: var(--font-weight-regular);
    position: relative;
    overflow-x: hidden;
}

img {
    border: none;
    outline: none;
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    display: block;
    list-style: none;
    padding: 0;
    margin: 0;
}

a, a:hover {
    text-decoration: none;
    transition: var(--transition-default);
}

a:focus {
    outline: 0;
    text-decoration: none;
}

button {
    border: none;
    background: none;
    font-family: var(--font-family);
    cursor: pointer;
}

input, textarea, select {
    font-family: var(--font-family);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-hint);
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family);
    -webkit-font-smoothing: antialiased;
    color: var(--color-text-heading);
    margin: 0;
}

h1 {
    font-size: var(--font-size-h1);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-heading);
    margin-bottom: 25px;
    letter-spacing: var(--letter-spacing-heading-1);
}

h2 {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-semibold);
    line-height: 1.1;
    margin-bottom: 25px;
    letter-spacing: var(--letter-spacing-heading-2);
    text-transform: uppercase;
}

h3 {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.025rem;
    line-height: var(--line-height-heading);
    margin-bottom: 10px;
}

h4 {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 10px;
}

h5, h6 {
    font-size: var(--font-size-h5);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 10px;
}

p {
    font-size: var(--font-size-body);
    color: var(--color-text-default);
    margin-bottom: 15px;
    line-height: var(--line-height-body);
}

small {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
}

strong, .font-bold {
    font-weight: var(--font-weight-bold);
}

em, .font-italic {
    font-style: italic;
}

/* ==========================================================================
   4. Layout & Spacing
   ========================================================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col,
[class*="col-"] {
    padding: 0 15px;
}

.col {
    flex: 1;
}

/* Column Utilities */
.col-1 { flex: 0 0 8.333%; }
.col-2 { flex: 0 0 16.666%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333%; }
.col-5 { flex: 0 0 41.666%; }
.col-6 { flex: 0 0 50%; }
.col-7 { flex: 0 0 58.333%; }
.col-8 { flex: 0 0 66.666%; }
.col-9 { flex: 0 0 75%; }
.col-10 { flex: 0 0 83.333%; }
.col-11 { flex: 0 0 91.666%; }
.col-12 { flex: 0 0 100%; }

/* Spacing Utilities - Padding */
.p-5 { padding: var(--spacing-xs); }
.p-10 { padding: var(--spacing-sm); }
.p-15 { padding: var(--spacing-md); }
.p-20 { padding: var(--spacing-lg); }
.p-25 { padding: var(--spacing-xl); }
.p-30 { padding: var(--spacing-2xl); }

.px-5 { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-10 { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-15 { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-20 { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.px-30 { padding-left: var(--spacing-2xl); padding-right: var(--spacing-2xl); }

.py-5 { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-10 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-15 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-20 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-30 { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }
.py-60 { padding-top: 60px; padding-bottom: 60px; }
.py-100 { padding-top: 100px; padding-bottom: 100px; }

/* Spacing Utilities - Margin */
.m-5 { margin: var(--spacing-xs); }
.m-10 { margin: var(--spacing-sm); }
.m-15 { margin: var(--spacing-md); }
.m-20 { margin: var(--spacing-lg); }
.m-25 { margin: var(--spacing-xl); }
.m-30 { margin: var(--spacing-2xl); }

.mx-5 { margin-left: var(--spacing-xs); margin-right: var(--spacing-xs); }
.mx-10 { margin-left: var(--spacing-sm); margin-right: var(--spacing-sm); }
.mx-15 { margin-left: var(--spacing-md); margin-right: var(--spacing-md); }
.mx-20 { margin-left: var(--spacing-lg); margin-right: var(--spacing-lg); }
.mx-auto { margin-left: auto; margin-right: auto; }

.my-5 { margin-top: var(--spacing-xs); margin-bottom: var(--spacing-xs); }
.my-10 { margin-top: var(--spacing-sm); margin-bottom: var(--spacing-sm); }
.my-15 { margin-top: var(--spacing-md); margin-bottom: var(--spacing-md); }
.my-20 { margin-top: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.my-30 { margin-top: var(--spacing-2xl); margin-bottom: var(--spacing-2xl); }

.mb-10 { margin-bottom: var(--spacing-sm); }
.mb-15 { margin-bottom: var(--spacing-md); }
.mb-20 { margin-bottom: var(--spacing-lg); }
.mb-25 { margin-bottom: var(--spacing-xl); }
.mb-30 { margin-bottom: var(--spacing-2xl); }
.mb-40 { margin-bottom: 40px; }
.mb-50 { margin-bottom: 50px; }
.mb-60 { margin-bottom: 60px; }

.mt-10 { margin-top: var(--spacing-sm); }
.mt-15 { margin-top: var(--spacing-md); }
.mt-20 { margin-top: var(--spacing-lg); }
.mt-30 { margin-top: var(--spacing-2xl); }

.ml-15 { margin-left: var(--spacing-md); }
.ml-20 { margin-left: var(--spacing-lg); }

/* ==========================================================================
   5. Colors & Backgrounds
   ========================================================================== */

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-heading { color: var(--color-text-heading); }
.text-dark { color: var(--color-text-dark); }
.text-muted { color: var(--color-text-muted); }
.text-white { color: var(--color-text-white); }
.text-hint { color: var(--color-text-hint); }

.bg-white { background-color: var(--color-bg-white); }
.bg-light { background-color: var(--color-bg-light); }
.bg-dark { background-color: var(--color-bg-dark); }
.bg-primary { background: var(--gradient-primary); }
.bg-primary-light { background-color: var(--color-primary-light); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

/* Display & Visibility */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

.visible { visibility: visible; }
.hidden { visibility: hidden; }
.invisible { display: none; }

/* ==========================================================================
   6. Responsive Breakpoints
   ========================================================================== */

/* Small devices (phones, less than 576px) */
@media (max-width: 575px) {
    .col-sm-1 { flex: 0 0 8.333%; }
    .col-sm-2 { flex: 0 0 16.666%; }
    .col-sm-3 { flex: 0 0 25%; }
    .col-sm-4 { flex: 0 0 33.333%; }
    .col-sm-6 { flex: 0 0 50%; }
    .col-sm-12 { flex: 0 0 100%; }

    .d-sm-none { display: none; }
    .d-sm-block { display: block; }
    .d-sm-flex { display: flex; }

    h1 {
        font-size: 32px;
        margin-bottom: 15px;
    }

    h2 {
        font-size: 20px;
        margin-bottom: 15px;
    }

    h3 {
        font-size: 16px;
    }

    .py-100 { padding-top: 50px; padding-bottom: 50px; }
    .container { padding: 0 12px; }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .col-md-1 { flex: 0 0 8.333%; }
    .col-md-2 { flex: 0 0 16.666%; }
    .col-md-3 { flex: 0 0 25%; }
    .col-md-4 { flex: 0 0 33.333%; }
    .col-md-6 { flex: 0 0 50%; }
    .col-md-12 { flex: 0 0 100%; }

    .d-md-none { display: none; }
    .d-md-block { display: block; }
    .d-md-flex { display: flex; }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .col-lg-1 { flex: 0 0 8.333%; }
    .col-lg-2 { flex: 0 0 16.666%; }
    .col-lg-3 { flex: 0 0 25%; }
    .col-lg-4 { flex: 0 0 33.333%; }
    .col-lg-5 { flex: 0 0 41.666%; }
    .col-lg-6 { flex: 0 0 50%; }
    .col-lg-7 { flex: 0 0 58.333%; }
    .col-lg-8 { flex: 0 0 66.666%; }
    .col-lg-9 { flex: 0 0 75%; }
    .col-lg-12 { flex: 0 0 100%; }

    .d-lg-none { display: none; }
    .d-lg-block { display: block; }
    .d-lg-flex { display: flex; }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .col-xl-1 { flex: 0 0 8.333%; }
    .col-xl-2 { flex: 0 0 16.666%; }
    .col-xl-3 { flex: 0 0 25%; }
    .col-xl-4 { flex: 0 0 33.333%; }
    .col-xl-6 { flex: 0 0 50%; }
    .col-xl-12 { flex: 0 0 100%; }

    .d-xl-none { display: none; }
    .d-xl-block { display: block; }
    .d-xl-flex { display: flex; }
}