/* ========== DESIGN SYSTEM — stil minimalist Apple ========== */
:root {
    --color-primary: #0071E3;
    --color-primary-light: #0077ED;
    --color-primary-dark: #0068D1;
    --color-primary-deeper: #005BB8;
    --color-emerald: #0071E3;
    --color-gold: #B58A2A;
    --color-gold-dark: #9A741F;
    --color-gold-light: #D4A94A;
    --color-bg: #F5F5F7;
    --color-bg-alt: #FFFFFF;
    --color-bg-card: rgba(255, 255, 255, 0.8);
    --color-bg-card-solid: #FFFFFF;
    --color-text: #1D1D1F;
    --color-text-secondary: #515154;
    --color-text-muted: #86868B;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-shadow: rgba(0, 0, 0, 0.04);
    --color-shadow-lg: rgba(0, 0, 0, 0.08);
    --color-danger: #FF3B30;
    --color-danger-bg: rgba(255, 59, 48, 0.08);
    --color-success: #34C759;
    --color-error: #FF3B30;
    --color-blue: #0071E3;
    --color-purple: #8B5CF6;
    --color-pink: #EC4899;
    /* Fonturi de sistem — fără fonturi externe, încărcare instantă */
    --font-heading: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --color-bg: #161617;
    --color-bg-alt: #1D1D1F;
    --color-bg-card: rgba(29, 29, 31, 0.8);
    --color-bg-card-solid: #1D1D1F;
    --color-text: #F5F5F7;
    --color-text-secondary: #A1A1A6;
    --color-text-muted: #6E6E73;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-shadow: rgba(0, 0, 0, 0.2);
    --color-shadow-lg: rgba(0, 0, 0, 0.3);
    --color-primary-light: #2997FF;
    --color-danger-bg: rgba(255, 69, 58, 0.12);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    line-height: 1.15;
    font-weight: 600;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
}

/* ========== NAVBAR ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 14px 0;
    transition: all var(--transition);
}

.navbar.scrolled {
    background: var(--color-bg-card);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
}

.navbar .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo svg {
    width: 32px;
    height: 32px;
}

/* Evidențiază „AI" din wordmark — mai bold, în culoarea accent, ușor separat și înclinat spre dreapta */
.logo-ai {
    color: var(--color-primary);
    font-weight: 800;
    margin-left: 2px;
    letter-spacing: 0.02em;
    font-style: italic;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-nav {
    padding: 8px 18px;
    border-radius: 980px;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
}

.nav-back {
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 980px;
    border: 1px solid var(--color-border);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.nav-back:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

.nav-back svg {
    width: 16px;
    height: 16px;
}

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

.btn-secondary:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--color-text-secondary);
}

.theme-toggle:hover {
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* Baza e aplicată și direct pe .btn-primary/.btn-outline — unele pagini le folosesc fără .btn */
.btn,
.btn-primary,
.btn-outline {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 11px 24px;
    border-radius: 980px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    line-height: 1.4;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
}

.btn-primary:active {
    background: var(--color-primary-dark);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: default;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

.btn-large {
    padding: 14px 32px;
    font-size: 1.02rem;
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Message Box */
.message-box {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    margin-bottom: 14px;
    display: none;
    line-height: 1.45;
}

.message-box.error {
    background: var(--color-danger-bg);
    border: 1px solid rgba(255, 59, 48, 0.2);
    color: var(--color-error);
}

.message-box.success {
    background: rgba(52, 199, 89, 0.08);
    border: 1px solid rgba(52, 199, 89, 0.2);
    color: var(--color-success);
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.form-label span.required {
    color: var(--color-error);
    font-weight: 600;
}

.input-field {
    width: 100%;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    padding: 10px 14px;
    font-size: 0.9rem;
    font-family: var(--font-body);
    outline: none;
    color: var(--color-text);
    background: var(--color-bg-card-solid);
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

[data-theme="dark"] .input-field {
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.input-field:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.input-field.input-error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.12);
}

.helper-text {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}