/* ============================================
   TIPRINO - PREMIUM DESIGN SYSTEM
   Ultra-minimal, Apple-inspired
   ============================================ */

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
    /* Colors */
    --color-white: #ffffff;
    --color-off-white: #fafafa;
    --color-black: #111111;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    /* Brand (Two-tone): white + Tiprino blue */
    --color-brand: #05567c;
    --color-brand-hover: #044a6a;
    --color-brand-ink: #033a53;

    /* Accent equals brand (keep naming for existing components) */
    --color-accent: var(--color-brand);
    --color-accent-light: #0a6a94;
    --color-accent-dark: var(--color-brand-hover);
    
    /* Typography (Two-font system) */
    --font-primary: 'IRANSansWeb', 'Tahoma', 'Arial', sans-serif;
    --font-secondary: 'Yekan', 'IRANSansWeb', 'Tahoma', 'Arial', sans-serif;
    
    /* Font Sizes */
    --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-size-6xl: 3.75rem;   /* 60px */
    --font-size-7xl: 4.5rem;    /* 72px */
    
    /* 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: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    --line-height-loose: 2;
    
    /* Spacing */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    --spacing-4xl: 6rem;     /* 96px */
    --spacing-5xl: 8rem;     /* 128px */
    
    /* Container */
    --container-max-width: 1280px;
    --container-padding: var(--spacing-xl);
    
    /* Border Radius */
    --radius-sm: 0.25rem;    /* 4px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 1rem;       /* 16px */
    --radius-xl: 1.5rem;     /* 24px */
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index */
    --z-nav: 1000;
    --z-overlay: 2000;
    --z-modal: 3000;
}

/* ============================================
   BASE STYLES
   ============================================ */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-black);
    background-color: var(--color-white);
    direction: rtl;
    text-align: right;
    overflow-x: hidden;
}

/* RTL Support */
[dir="rtl"] {
    direction: rtl;
    text-align: right;
}

[dir="ltr"] {
    direction: ltr;
    text-align: left;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
}

h2 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
}

h3 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
}

h4 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
}

h5 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
}

h6 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
    color: var(--color-gray-700);
}

a {
    color: var(--color-accent);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-dark);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-5xl) 0;
}

.section--large {
    padding: var(--spacing-5xl) 0;
}

.section--small {
    padding: var(--spacing-3xl) 0;
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid--2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid--4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-black);
    letter-spacing: -0.02em;
    transition: opacity var(--transition-fast);
    text-decoration: none;
}

.nav__logo:hover {
    opacity: 0.7;
}

.nav__logo-image {
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex-shrink: 0;
    display: block;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link:hover {
    color: var(--color-black);
}

.nav__link--cta {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-brand);
    color: var(--color-white);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.nav__link--cta:hover {
    background-color: var(--color-brand-hover);
    color: var(--color-white);
    transform: translateY(-1px);
}

.nav__link--active {
    color: white;
    font-weight: var(--font-weight-semibold);
    position: relative;
}

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    right: 0;
    left: 0;
    height: 2px;
    background-color: var(--color-accent);
    border-radius: var(--radius-full);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 24px;
    height: 24px;
    padding: 0;
}

.nav__toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--color-black);
    transition: all var(--transition-base);
    border-radius: var(--radius-full);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem; /* 8px 20px - سایز استاندارد */
    font-size: var(--font-size-sm); /* 14px */
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
    line-height: 1.5;
    white-space: nowrap;
}

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

.btn--primary:hover {
    background-color: var(--color-brand-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-brand);
    border: 1px solid rgba(5, 86, 124, 0.28);
}

.btn--secondary:hover {
    border-color: rgba(5, 86, 124, 0.6);
    background-color: rgba(5, 86, 124, 0.06);
}

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

.btn--accent:hover {
    background-color: var(--color-accent-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--large {
    padding: 0.625rem 1.5rem; /* 10px 24px - کمی بزرگ‌تر از استاندارد */
    font-size: var(--font-size-base); /* 16px */
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-brand));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.card:hover::before {
    opacity: 1;
}

.card__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-black);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card__text {
    color: var(--color-gray-600);
    line-height: var(--line-height-relaxed);
}

.card__icon {
    width: 24px;
    height: 24px;
    color: var(--color-brand);
    flex-shrink: 0;
}

.card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-gray-100), var(--color-gray-200));
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-5xl) 0;
    background: linear-gradient(to bottom, var(--color-white), rgba(5, 86, 124, 0.04));
}

.hero__content {
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    font-size: var(--font-size-6xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-xl);
    color: var(--color-black);
    letter-spacing: -0.03em;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-relaxed);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Split hero (text right, image left) */
.hero--split {
    text-align: right;
}

.hero--split .hero__grid {
    display: grid;
    grid-template-columns: minmax(320px, 1.15fr) minmax(280px, 0.85fr);
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero--split .hero__content {
    max-width: none;
    margin: 0;
}

.hero--split .hero__subtitle {
    margin-right: 0;
    margin-left: 0;
    max-width: 44rem;
}

.hero--split .hero__actions {
    justify-content: flex-start;
}

.hero__media {
    width: 100%;
    display: flex;
    justify-content: flex-start;
}

.hero__image {
    width: 100%;
    height: auto;
    max-width: 520px;
    object-fit: cover;
}

/* ============================================
   SECTIONS
   ============================================ */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-4xl);
}

.section-header__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    color: var(--color-black);
}

.section-header__text {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    line-height: var(--line-height-relaxed);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-brand);
    color: var(--color-gray-300);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-5xl);
}

.footer__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    margin-bottom: var(--spacing-3xl);
}

.footer__logo {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer__tagline {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
}

.footer__heading {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.02em;
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer__link {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-white);
}

.footer__bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
}

.footer__copyright {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

/* ============================================
   FORMS
   ============================================ */
.form {
    max-width: 600px;
    margin: 0 auto;
}

.form__group {
    margin-bottom: var(--spacing-lg);
}

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-primary);
    color: var(--color-black);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px rgba(5, 86, 124, 0.12);
}

.form__input:invalid:not(:placeholder-shown),
.form__textarea:invalid:not(:placeholder-shown) {
    border-color: #ef4444;
}

.form__textarea {
    min-height: 150px;
    resize: vertical;
}

.form__input:disabled,
.form__textarea:disabled,
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Form Messages */
.form-message {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-align: center;
    animation: slideDown 0.3s ease;
}

.form-message--success {
    background-color: #10b981;
    color: white;
}

.form-message--error {
    background-color: #ef4444;
    color: white;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
    text-align: center;
}

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

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

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

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--color-brand);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-brand);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for multiple fade-in elements */
.fade-in:nth-child(1) { transition-delay: 0.1s; }
.fade-in:nth-child(2) { transition-delay: 0.2s; }
.fade-in:nth-child(3) { transition-delay: 0.3s; }
.fade-in:nth-child(4) { transition-delay: 0.4s; }
.fade-in:nth-child(5) { transition-delay: 0.5s; }
.fade-in:nth-child(6) { transition-delay: 0.6s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --container-padding: var(--spacing-lg);
    }
    
    .section {
        padding: var(--spacing-4xl) 0;
    }
    
    .hero__title {
        font-size: var(--font-size-5xl);
    }

    .hero--split .hero__grid {
        gap: var(--spacing-2xl);
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav__logo-image {
        width: 28px;
        height: 28px;
    }
    
    .nav__logo-text {
        font-size: var(--font-size-lg);
    }
    
    .nav__menu {
        position: fixed;
        top: 72px;
        right: 0;
        left: 0;
        background-color: var(--color-white);
        border-bottom: 1px solid var(--color-gray-200);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero__title {
        margin-top: 2rem;
        font-size: var(--font-size-4xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero__actions {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        justify-content: center;
    }

    .hero--split .hero__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero--split .hero__media {
        justify-content: center;
        order: 2;
    }

    .hero--split .hero__content {
        order: 1;
    }

    .hero--split .hero__actions {
        justify-content: center;
    }
    
    .hero__actions .btn {
        flex: 0 1 auto;
        min-width: auto;
    }
    
    /* دکمه‌های فرم در موبایل full width باشند */
    .form button.btn,
    .form .btn {
        width: 100%;
    }
    
    .grid--2,
    .grid--3,
    .grid--4 {
        grid-template-columns: 1fr;
    }
    
    .footer__inner {
        grid-template-columns: 1fr;
    }
    
    .footer__links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --container-padding: var(--spacing-md);
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--spacing-3xl) 0;
    }
    
    .section {
        padding: var(--spacing-3xl) 0;
    }
}