@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-blue: #003366;
    --primary-red: #cc3333;
    --bg-light: #f8f9fa;
    --text-dark: #1a1a1a;
    --text-muted: #666666;
    --white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Branding */
header {
    background: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-blue);
}

.logo span {
    color: var(--primary-red);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background-color: #002244;
}

.btn-outline {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    background: transparent;
}

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

/* Chat UI Styles */
.chat-container {
    max-width: 800px;
    margin: 20px auto;
    height: 60vh;
    display: flex;
    flex-direction: column;
    gap: 15px;
    overflow-y: auto;
    padding: 20px;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.message {
    max-width: 80%;
    padding: 12px 18px;
    border-radius: 15px;
    margin: 5px 0;
}

.message.ai {
    background: #eef2f7;
    align-self: flex-start;
    border-bottom-left-radius: 2px;
}

.message.user {
    background: var(--primary-blue);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}

/* Controls */
.controls-bar {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    background: var(--white);
    padding: 15px 30px;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* Responsive Grid */
.grid {
    display: grid;
    gap: 30px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Speaking Animation (Wave) */
.voice-wave {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    height: 40px;
}

.wave-bar {
    width: 4px;
    height: 10px;
    background: var(--primary-blue);
    border-radius: 3px;
    animation: wave-animation 1s infinite ease-in-out;
    display: none;
}

.wave-bar.active {
    display: block;
}

.wave-bar:nth-child(2) {
    animation-delay: 0.1s;
}

.wave-bar:nth-child(3) {
    animation-delay: 0.2s;
}

.wave-bar:nth-child(4) {
    animation-delay: 0.3s;
}

.wave-bar:nth-child(5) {
    animation-delay: 0.4s;
}

@keyframes wave-animation {

    0%,
    100% {
        height: 10px;
    }

    50% {
        height: 30px;
    }
}

.hidden {
    display: none;
}