/* ATC Login Page - Aviation Theme CSS */
:root {
    --primary-color: #3a7ca5;
    --secondary-color: #f2f7fa;
    --accent-color: #81b29a;
    --text-color: #2d3748;
    --background-color: #f8fafc;
    --border-color: #cbd5e0;
    --hover-color: #4a90e2;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a3a5f 0%, #2c5282 100%);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

    /* Aviation Background Elements */
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: url('https://images.unsplash.com/photo-1569154941061-e231b4725ef1?q=80&w=1920');
        background-size: cover;
        background-position: center;
        opacity: 0.1;
        z-index: -1;
    }
/* ATC Login Page - Aviation Theme CSS */
:root {
    --primary-color: #3a7ca5;
    --secondary-color: #f2f7fa;
    --accent-color: #81b29a;
    --text-color: #2d3748;
    --background-color: #f8fafc;
    --border-color: #cbd5e0;
    --hover-color: #4a90e2;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a3a5f 0%, #2c5282 100%);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

    /* Aviation Background Elements */
    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: url('https://images.unsplash.com/photo-1569154941061-e231b4725ef1?q=80&w=1920');
        background-size: cover;
        background-position: center;
        opacity: 0.1;
        z-index: -1;
    }

/* Airplane Silhouettes */
.airplane {
    position: absolute;
    width: 100px;
    height: 100px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 12a10 10 0 1 1-20 0 10 10 0 0 1 20 0z'/%3E%3Cpath d='M16 12h4'/%3E%3Cpath d='M8 12H4'/%3E%3Cpath d='M12 16v4'/%3E%3Cpath d='M12 8V4'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.1;
    z-index: -1;
}

.airplane-1 {
    top: 15%;
    left: 10%;
    transform: rotate(45deg);
    animation: fly-1 60s linear infinite;
}

.airplane-2 {
    bottom: 20%;
    right: 15%;
    transform: rotate(-30deg);
    animation: fly-2 80s linear infinite;
}

@keyframes fly-1 {
    0% {
        transform: translate(0, 0) rotate(45deg);
    }

    50% {
        transform: translate(50vw, 20vh) rotate(30deg);
    }

    100% {
        transform: translate(0, 0) rotate(45deg);
    }
}

@keyframes fly-2 {
    0% {
        transform: translate(0, 0) rotate(-30deg);
    }

    50% {
        transform: translate(-40vw, 10vh) rotate(-45deg);
    }

    100% {
        transform: translate(0, 0) rotate(-30deg);
    }
}
.atc-avatar {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(120deg, #226ba0 60%, #81b29a 100%);
    color: #fff;
    font-weight: bold;
    font-size: 1.1rem;
    border-radius: 50%;
    box-shadow: 0 1px 6px #1b6ec255;
    margin-right: 4px;
    border: 2px solid #fff;
}
.atc-avatar-img {
    width: 38px;
    height: 38px;
    object-fit: cover;
    border-radius: 50%;
    border: 2px solid #fff;
    box-shadow: 0 1px 6px #1b6ec255;
}
/* Flight Path Lines */
.flight-path {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.1) 20%, rgba(255, 255, 255, 0.2) 50%, rgba(255, 255, 255, 0.1) 80%, rgba(255, 255, 255, 0) 100%);
}

.flight-path-1 {
    top: 30%;
    left: 0;
    width: 100%;
    transform: rotate(5deg);
}

.flight-path-2 {
    top: 70%;
    left: 0;
    width: 100%;
    transform: rotate(-3deg);
}

/* Login Container */
.container {
    width: 100%;
    max-width: 450px;
    padding: 15px;
    z-index: 1;
}
.atc-body {
    background: linear-gradient(120deg, #274472 0%, #41729f 100%);
    min-height: 100vh;
    position: relative;
}

.atc-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: url('https://images.unsplash.com/photo-1569154941061-e231b4725ef1?q=80&w=1920') center/cover no-repeat;
    opacity: 0.10;
    filter: blur(1.5px);
}

.atc-navbar {
    background: rgba(33, 46, 83, 0.85);
    color: #fff;
    border-bottom: 1.5px solid #4a90e2;
}

    .atc-navbar .navbar-brand {
        color: #fff !important;
        letter-spacing: 1px;
    }

.atc-sidebar {
    width: 220px;
    min-height: 100vh;
    background: rgba(36, 60, 88, 0.97);
    color: #fff;
    border-right: 1px solid #81b29a15;
    box-shadow: 2px 0 10px #23283a33;
}

    .atc-sidebar .nav-link {
        color: #cce0f8;
        border-radius: 10px;
        padding: 10px 14px;
        transition: all 0.15s;
        font-size: 1.07rem;
    }

        .atc-sidebar .nav-link:hover, .atc-sidebar .nav-link.active {
            background: linear-gradient(90deg, #1b6ec2 50%, #3a7ca5 100%);
            color: #fff !important;
            box-shadow: 0 2px 10px #00aaff20;
        }

.atc-main-content {
    background: rgba(255,255,255,0.88);
    border-radius: 18px;
    box-shadow: 0 4px 18px #1a214530;
    min-height: 90vh;
}

.footer {
    background: rgba(230, 245, 255, 0.82);
    border-top: 1px solid #b3d7e7;
}

/* Login Card */
.login-card {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}

.login-header {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 20px;
    text-align: center;
    position: relative;
}

    .login-header::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 6px;
        background: linear-gradient(90deg, #4a90e2, #63b3ed, #4a90e2);
        background-size: 200% 100%;
        animation: gradient 3s ease infinite;
    }

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.logo-container {
    width: 80px;
    height: 80px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

    .logo-container i {
        font-size: 40px;
        color: var(--primary-color);
        z-index: 1;
    }

    .logo-container::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgba(74, 144, 226, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
        animation: radar-ping 2s ease-out infinite;
    }

@keyframes radar-ping {
    0% {
        transform: scale(0.3);
        opacity: 1;
    }

    100% {
        transform: scale(3);
        opacity: 0;
    }
}

.login-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.login-body {
    padding: 30px 25px;
    position: relative;
}

/* Form Styles */
.form-group, .mb-3 {
    margin-bottom: 20px;
    position: relative;
}

.form-label, label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    display: block;
    width: 100%;
    padding: 12px 15px;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-color);
    background-color: white;
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

    .form-control:focus {
        border-color: var(--primary-color);
        outline: 0;
        box-shadow: 0 0 0 0.2rem rgba(58, 124, 165, 0.25);
    }

.text-danger {
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 5px;
    display: block;
}

/* Button Styles */
.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 12px;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 8px;
    transition: all 0.15s ease-in-out;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    position: relative;
    overflow: hidden;
}

    .btn-primary:hover {
        background-color: #2c5282;
        border-color: #2c5282;
    }

    .btn-primary::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 5px;
        height: 5px;
        background: rgba(255, 255, 255, 0.5);
        opacity: 0;
        border-radius: 100%;
        transform: scale(1, 1) translate(-50%);
        transform-origin: 50% 50%;
    }

    .btn-primary:hover::after {
        animation: ripple 1s ease-out;
    }

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }

    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* Responsive Adjustments */
@media (max-width: 576px) {
    .container {
        padding: 10px;
    }

    .login-header {
        padding: 20px 15px;
    }

    .login-body {
        padding: 20px 15px;
    }
}
/* Airplane Silhouettes */
.airplane {
    position: absolute;
    width: 100px;
    height: 100px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='1' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 12a10 10 0 1 1-20 0 10 10 0 0 1 20 0z'/%3E%3Cpath d='M16 12h4'/%3E%3Cpath d='M8 12H4'/%3E%3Cpath d='M12 16v4'/%3E%3Cpath d='M12 8V4'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    opacity: 0.1;
    z-index: -1;
}
/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        width: 95%;
        margin: 10px auto;
    }

    .navbar-nav {
        flex-wrap: wrap; /* ???? ?????? ?????? ????????? */
    }

    .nav-item {
        margin-bottom: 5px; /* ???? ????? ???? ????? ?????? ??????? */
    }
}

.airplane-1 {
    top: 15%;
    left: 10%;
    transform: rotate(45deg);
    animation: fly-1 60s linear infinite;
}

.airplane-2 {
    bottom: 20%;
    right: 15%;
    transform: rotate(-30deg);
    animation: fly-2 80s linear infinite;
}

@keyframes fly-1 {
    0% {
        transform: translate(0, 0) rotate(45deg);
    }

    50% {
        transform: translate(50vw, 20vh) rotate(30deg);
    }

    100% {
        transform: translate(0, 0) rotate(45deg);
    }
}

@keyframes fly-2 {
    0% {
        transform: translate(0, 0) rotate(-30deg);
    }

    50% {
        transform: translate(-40vw, 10vh) rotate(-45deg);
    }

    100% {
        transform: translate(0, 0) rotate(-30deg);
    }
}

/* Flight Path Lines */
.flight-path {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.1) 20%, rgba(255, 255, 255, 0.2) 50%, rgba(255, 255, 255, 0.1) 80%, rgba(255, 255, 255, 0) 100%);
}

.flight-path-1 {
    top: 30%;
    left: 0;
    width: 100%;
    transform: rotate(5deg);
}

.flight-path-2 {
    top: 70%;
    left: 0;
    width: 100%;
    transform: rotate(-3deg);
}

/* Login Container */
.container {
    width: 100%;
    max-width: 450px;
    padding: 15px;
    z-index: 1;
}

/* Login Card */
.login-card {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}

.login-header {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 20px;
    text-align: center;
    position: relative;
}

    .login-header::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 6px;
        background: linear-gradient(90deg, #4a90e2, #63b3ed, #4a90e2);
        background-size: 200% 100%;
        animation: gradient 3s ease infinite;
    }

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.logo-container {
    width: 80px;
    height: 80px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

    .logo-container i {
        font-size: 40px;
        color: var(--primary-color);
        z-index: 1;
    }

    .logo-container::before {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, rgba(74, 144, 226, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
        animation: radar-ping 2s ease-out infinite;
    }

@keyframes radar-ping {
    0% {
        transform: scale(0.3);
        opacity: 1;
    }

    100% {
        transform: scale(3);
        opacity: 0;
    }
}

.login-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.login-body {
    padding: 30px 25px;
    position: relative;
}

/* Form Styles */
.form-group, .mb-3 {
    margin-bottom: 20px;
    position: relative;
}

.form-label, label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    display: block;
    width: 100%;
    padding: 12px 15px;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-color);
    background-color: white;
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

    .form-control:focus {
        border-color: var(--primary-color);
        outline: 0;
        box-shadow: 0 0 0 0.2rem rgba(58, 124, 165, 0.25);
    }

.text-danger {
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 5px;
    display: block;
}

/* Button Styles */
.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 12px;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 8px;
    transition: all 0.15s ease-in-out;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    position: relative;
    overflow: hidden;
}

    .btn-primary:hover {
        background-color: #2c5282;
        border-color: #2c5282;
    }

    .btn-primary::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 5px;
        height: 5px;
        background: rgba(255, 255, 255, 0.5);
        opacity: 0;
        border-radius: 100%;
        transform: scale(1, 1) translate(-50%);
        transform-origin: 50% 50%;
    }

    .btn-primary:hover::after {
        animation: ripple 1s ease-out;
    }

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }

    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* Responsive Adjustments */
@media (max-width: 576px) {
    .container {
        padding: 10px;
    }

    .login-header {
        padding: 20px 15px;
    }

    .login-body {
        padding: 20px 15px;
    }
}